GP8 1/8-Inch Drywall Guidepoint Cutting Bits (8-Pack), Cutting Drywall, For use with Roto Zip Spiral Saw

This tool was a MUST HAVE for finishing my basement. It did the job as well as I could have imagined. Very durable and super pleased with my purchase.

Great price and product

It's alright, worth the price for Zhao.

Works perfectly for cutting dry wall around a stud. Make sure depth is set correctly on rotozip.

I used these bits with Dewalt DW660 drywall router. In the past, I used Dewalt bits, but those are no longer available. Now I understand why you cannot get Dewalt bits - the Roto Zip ones are much better. The key differences are that the non-cutting tip of the bit is shorter (which is good, DeWalt bits had too long of a tip, to my taste), and that the bit appears to be sharper (at least, it seems to cut easier). I've seen reviews where people wrote that the bit is easy to break. You have to do something wrong to break it while cutting drywall. Here are some tips to reduce the risk of breakage: 1. When you install it in your drywall router, slide it into the collet to the point where spiral cutting edge begins. You do not want the collet to grab by the cutting part with spiral cutters, but stick it in as far as possible all the way to the cutters. Do not let the bit stick out more than that. The longer is the exposed part of the bit, the easier it is to break it. Just think about leverage applied to a long bit. 2. Set up depth collar on your drywall router in such a way that the spiral cutting edge starts on the other side of the drywall. This means that you will set the depth of cut at thickness of drywall (usually 1/2") plus about 3/16" (which is the length of the very tip which does not have cutters, plus a little extra). If your router does not cut the drywall easily, it most likely means that you set the depth of cut too shallow. Remember, the very tip of the bit does not have the sharp cutting edges. It is used to guide the bit along the edge of your light can or junction box. IT does not cut. Only spiral cutters can cut the drywall. If the cutter-less guide tip is not entirely on the other side of the drywall, you will not be able to cut. It would be like chewing without teeth. When you are setting the depth of cut against a scrap piece of drywall, you should see the beginning of the cutting edge on the other side of the drywall. If you cannot cut drywall like butter because you set the depth of cut incorrectly, you would end up pushing on the router too much trying to make it cut and would break the bit in no time. 3. No strong pressure on the router. The force should be light, and mainly directed towards your box / can to make sure that the router follows its contour. In other words, you should feel more pressure towards the box along which you are cutting (and against the drywall, to make sure that the depth limiter is always in touch with the drywall) than in the direction in which your cut goes. Drywall is very easy to cut. It is soft. Any excess force would lead to either router wandering off the desired path, or breakage of the bit. The last but not the least, as you certainly know, when you cut around a box on along its outside (external) edge, you route counter-clockwise. This reduces the odds of router going off the path because it creates a force which pushes the bit towards the edge of the box.

As I have put up in my house a total of 170 drywall boards. These little bits are superb for cutting out fixture holes. I cannot think of sawing through the holes and doing it as clean as it has come out. A truely great product when used properly. And yes. The bits do wear down and need to be replaced. But cost affective like no other.

awesome product no complaints

Not great. Bits kept breaking off after a few cuts. Would pass on these and get the Roto-Zip 5/32 X-Bits instead.

Prezzo qualità ok

Envio rápido boa qualidade

Son de muy buen fabricante

I recently used the Roto Zip GP8 bits to remove a significant section of drywall in my basement, and let me tell you, they made the job significantly easier. The 1/8-inch guide point is incredibly precise, allowing for clean, controlled cuts, even when dealing with standard drywall. The fact that this is an 8-pack is excellent for larger projects, as it meant I didn't have to worry about running out mid-way through. The bits maintained their sharpness throughout, which is crucial when you're working on an extensive project. Here's a breakdown of my experience: ✅ Precision Cutting: The guide point really does its job, minimizing wobble and ensuring clean lines. ✅ Durability: Even after cutting through a large amount of drywall, the bits remained sharp. ✅ Quantity: The 8-pack is perfect for big projects, offering excellent value. ✅ Ease of Use: They fit perfectly into my dewalt tool and were simple to use. Of course, no product is perfect: ❌ Potential for Breakage: Like any small bit, they can break if you apply too much side pressure. 2 broke ❌ Limited Material Use: These are really best for drywall; other materials might require different bits. Compared to some generic drywall bits I've used, the Roto Zip GP8 bits definitely stood out for their durability and precision. If you're planning a large drywall project and need reliable, sharp bits, these are a fantastic choice. Especially if you are a do it yourself person. These bits will save you time and frustration.

I've done an entire floor with a single bit (including one room with 2 layers of 13mm fireproof plasterboard), and it is still going strong. I didn't even need the other 7 bits in the pack!