--- product_id: 206579455 title: "Metric M42 drill btis(1-10mm/19pcs)" brand: "stroton" price: "₱8184" currency: PHP in_stock: true reviews_count: 13 category: "Stroton" url: https://www.desertcart.ph/products/206579455-metric-m42-drill-btis-1-10mm-19pcs store_origin: PH region: Philippines --- # 68-70 HRC Rockwell Hardness - extreme heat resistance 3-Step Split Point Design - 3-5x faster drilling M42 8% Cobalt Steel - premium durability Metric M42 drill btis(1-10mm/19pcs) **Brand:** stroton **Price:** ₱8184 **Availability:** ✅ In Stock ## Summary > ⚡ Drill Smarter, Not Harder — The Ultimate Cobalt Powerhouse ## Quick Answers - **What is this?** Metric M42 drill btis(1-10mm/19pcs) by stroton - **How much does it cost?** ₱8184 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/206579455-metric-m42-drill-btis-1-10mm-19pcs) ## Best For - stroton enthusiasts ## Why This Product - Trusted stroton brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision & Speed:** Innovative 3-step split point tip ensures immediate bite and up to 5x faster drilling with less walking. - • **Complete Size Range:** 19-piece set from 1mm to 10mm in 0.5mm increments covers every professional drilling need. - • **Unmatched Durability:** Crafted from premium M42 cobalt steel with 8% cobalt for superior wear and heat resistance. - • **Versatile Performance:** Engineered for stainless steel, hard metals, aluminum, plastics, and hardwood with flawless precision. - • **Cost-Effective Longevity:** Despite premium price, lower cost per hole thanks to extended tool life and consistent cutting efficiency. ## Overview The STROTON Metric M42 8% Cobalt Twist Drill Bits Set features 19 precision-engineered bits ranging from 1mm to 10mm, crafted from premium M42 cobalt steel with 68-70 HRC hardness. Designed with a 3-step split point tip, these bits deliver 3 to 5 times faster drilling and exceptional heat and wear resistance, making them ideal for stainless steel, hard metals, aluminum, plastics, and hardwood. This set offers professional-grade durability and precision, ensuring a lower cost per hole and long-lasting performance for demanding metalworking and woodworking tasks. ## Description Product Description STROTON Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) Why choose STROTON cobalt drill bits? The research shows that HSS with cobalt has a higher temperature resistance and Red hardness, a greater wear resistance(Hardness) and a higher heat treat response than HSS without cobalt . Red hardness, it causes the hardened steel to have an ability to maintain hardness at approximately 860-880 ℃. Higher Tempering resistance,it means to maintain a high hardness at high temperatures for an extended period of time. 68-70 HRC,it means that the drill bits has 3X cutting ability and 2X durability. This drill bits set is made of Premium Cobalt (80,000 dollars per ton). M42 Cobalt 8% Alloy Holds up better than generic high-speed steel,8 % Cobalt gives high-speed steel more heat and wear resistance. 3 Steps . Design (3X-5X Drilling Efficiency) 3 Steps desigh tip starts drilling immediately with less force and eliminates "walking" across the work surface. Ideal for Stainless steel and Hardmetal,Hardwood,Aluminum,Copper,Plastic and Hardwood. Ideal for Metal and Hardwood Suitable for drilling Stainless Steel,Hard Metals,Aluminum,Copper,Plastic and Hardwood. The 3 steps design makes it accurately centered for woodworking jobs that require precision drilling. Also, the cobalt-containing design makes it perform even better in hardwood drilling. The drill bit should be perpendicular to the workpiece when used. Non-vertical use may cause the drill bit to break. Using a drill press with sufficient power will make drilling easier. Do not use the drill bit on a percussion drill. This Drill bit can not be used on glass, walls and concrete. Controling the drill speed from 200 to 1000 RPM would make it easier for you to drill holes on stainless steel. A high RPM does not improve drilling efficiency, but rather increases the heat between the bit and the workpiece, which may cause the bit to soften and the workpiece to harden. Drill diameter≤5mm，RPM（1000~700） 5-10mm，RPM（700~350） 10-15mm，RPM（350~200） Using cutting fluid will make the bit last longer. Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating and forming a very hard oxide layer. It also works adding some vinegar,soy sauce or water if you don't have engine oil. Review: Outstanding drill bits backed by exceptional customer service - These drill bits are genuinely very good quality and have performed extremely well for me when drilling into a wide range of materials, particularly metals (excluding concrete and masonry, as expected). They cut cleanly, feel well made, and have clearly been designed with durability in mind. During normal use, I unfortunately had two bits break. I contacted Stroton more to inform them than to complain, fully expecting at most a replacement for the damaged items. Instead, they responded quickly, asked no awkward questions, and simply requested confirmation of my address so they could send out replacements. To my surprise — and genuine appreciation — they sent out an entire new set, not just the broken pieces. This level of customer care is rare these days and speaks volumes about the company’s integrity and confidence in their products. Mistakes or failures can happen with any tool, but how a company responds is what really matters. Stroton handled this perfectly: polite, efficient, generous, and hassle-free. The replacement is already on its way, and I couldn’t be more impressed. Excellent drill bits, but even better customer service. I wouldn’t hesitate to buy from Stroton again and would happily recommend them to others. Review: Drill bit snapped on first use - I purchased the cobolt drill bit set as i have dozens of drill bit sets but wanted a set of higher quality. As can be seen in the photo my cobolt set remains largely unused however, on using the 3.5 mm bit it snapped first use. I work private security overseas and so my time in the uk has been limited until now. It would be nice if Stroton were to honour their stated lifetime guarantee but am not holding out much hope but you never know. A good set of drill bits with the 3 step bit head design but very brittle. ## Features - Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life. - 3 Steps Design for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic. - This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes. - The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding Throng the Material with a Blunt Drill Bit. - 19Pcs 135 Degree Split Point Drill Bits Includes :1mm(length:3.4cm) 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm(length:8.5cm) 5.5mm 6mm(length:9cm) 6.5mm 7mm 7.5mm 8mm(length:11.5cm) 8.5mm 9mm 9.5mm 10mm(length:13cm) [DIA 0.5mm Increments] . ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MZQMPMC | | Best Sellers Rank | 1,287 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 2 in Metalworking & Multi-Purpose Drill Bit Sets | | Brand | STROTON | | Country Of Origin | China | | Customer Reviews | 4.3 out of 5 stars 4,681 Reviews | | Cutting Angle String | 90 Degrees | | Cutting Diameter | 10 Millimetres | | Cutting angle string | 90 Degrees | | Cutting diameter | 10 Millimetres | | Finish Types | Uncoated | | Finish type | Uncoated | | Item Weight | 454 g | | Manufacturer | STROTON | | Manufacturer Part Number | M42 Cobalt-8(19pcs) | | Material | Cobalt | | Minimum Bore Diameter | 1 Millimetres | | Number of Flutes | 1 | | Number of Packs | 1 | | Number of Pieces | 19 | | Point Style | Split Point | | Set Name | 1-10mm (19PCS) | | Shank Type | Straight | | Shank type | Straight | | Surface Recommendation | Stainless Steel, Hard Metal, Hardwood, Aluminum, Plastic | | Tool Flute Type | Spiral | | UPC | 743829466298 | | Unit Count | 1 count | ## Product Details - **Cutting angle string:** 90 Degrees - **Cutting diameter:** 10 Millimetres - **Finish type:** Uncoated - **Material:** Cobalt - **Shank type:** Straight ## Images ![Metric M42 drill btis(1-10mm/19pcs) - Image 1](https://m.media-amazon.com/images/I/71YyLQiGN8L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can these drill through a car's trunk without any issues?** A: These are made to drill through thick hard steel. Thus are very hard and brittle and will break easily if improper angle is applied. For drilling trunk or locks use a titanium bit and buy a few of them as they dull quick but get the job done. **Q: Bought the 19 pc set; 3mm but broke immediately. Can anyone point me to where I can buy replacement? Thank you.** A: Hi,I am the seller. You need to click the blue word [STROTON] in "Sold by STROTON and Fulfilled by Amazon" below the "Add to Cart" of this Drill bit's listing. Then click [Ask a question] that write the condtion simply to Establish contact channels with me through Amazon message system. Then I can handle the follow-up to your order. Best regards STROTON **Q: Can they drill titanium** A: Honestly,They are good for drilling steel and do the job well. But Titanium alloy has very high hardness. And We can't guarantee. If it doesn't work well, you could return it. If it works（Lubricant Must Be Used）, you could share it with other customers. **Q: What is the length of these bits?** A: They are average lengths. The 1mm is 3.4cm and length increase proportionally to the 10mm which is 5.4cm. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Outstanding drill bits backed by exceptional customer service *by P***L on 21 January 2026* These drill bits are genuinely very good quality and have performed extremely well for me when drilling into a wide range of materials, particularly metals (excluding concrete and masonry, as expected). They cut cleanly, feel well made, and have clearly been designed with durability in mind. During normal use, I unfortunately had two bits break. I contacted Stroton more to inform them than to complain, fully expecting at most a replacement for the damaged items. Instead, they responded quickly, asked no awkward questions, and simply requested confirmation of my address so they could send out replacements. To my surprise — and genuine appreciation — they sent out an entire new set, not just the broken pieces. This level of customer care is rare these days and speaks volumes about the company’s integrity and confidence in their products. Mistakes or failures can happen with any tool, but how a company responds is what really matters. Stroton handled this perfectly: polite, efficient, generous, and hassle-free. The replacement is already on its way, and I couldn’t be more impressed. Excellent drill bits, but even better customer service. I wouldn’t hesitate to buy from Stroton again and would happily recommend them to others. ### ⭐⭐⭐⭐⭐ Drill bit snapped on first use *by J***M on 30 July 2026* I purchased the cobolt drill bit set as i have dozens of drill bit sets but wanted a set of higher quality. As can be seen in the photo my cobolt set remains largely unused however, on using the 3.5 mm bit it snapped first use. I work private security overseas and so my time in the uk has been limited until now. It would be nice if Stroton were to honour their stated lifetime guarantee but am not holding out much hope but you never know. A good set of drill bits with the 3 step bit head design but very brittle. ### ⭐⭐⭐⭐ Decent Quality Bits At A Keen Price, Backed Up By Excellent Customer Service *by M***N on 3 March 2021* The item was sold at a keen price and delivered in double-quick time. I ordered the Cobalt drill bits because, having read the description, I believed they would be a more resilient bit than the normal HSS type, and would do the job of drilling out the sheared stub of a fixing bolt. However, I used two of the new bits to try and drill a pilot hole in the end of the stub and both of them very quickly blunted and lost their cutting edge, making no impression on the stub (I am unable to say what type of steel the sheared bolt stub was manufactured from). In view of this, and previously having blunted and broken several HSS bits, I was forced to abandon trying to remove the stub and used the Cobalt bits to drill a new hole through the 2mm steel sheeting which was easily achieved. And so, although the Cobalt bits didn't perform as I had hoped, they do appear to be quite a sturdy product and easily able to deal with cutting through reasonable thickness, normal steel, without a problem. As a result of the above, I contacted the seller to request replacement of the two damaged bits under the terms of their warranty. They not only responded immediately but did more than I anticipated, sending me a full new set of drill bits, as well as giving me a full refund on those initially purchased! What more could anyone ask for? If that's not excellent customer service, I don't know what is!! I recommend the company highly. ## Frequently Bought Together - Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) - Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size - MACXCOIP Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ph/products/206579455-metric-m42-drill-btis-1-10mm-19pcs](https://www.desertcart.ph/products/206579455-metric-m42-drill-btis-1-10mm-19pcs) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-08-20*