What are the dimensions of the actual extension (not the packing box). Diameter of male end, female end, and shank in between?

The tool is exactly 12" from end to end. The female end is 1 1/4" X 1/2"..with an inside diameter of 5/16". The male end is 1 9/16" long and is hexagon shaped from the end. It fits into a 1/4" hex drill bit receiver. The shank in between the two ends is 5/16" X 9 1/8".

What is the diameter? If I have 3/8" bit will the extender fit through the drilled hole?

No a 3/8” bit it’s not big enough. You need at least a half inch bit to clear the hub of the extension bit.

Where can I buy set screws for this tool? A screw spun off in first use.

You have two 6mmx1 set screws 5mm long. You can get them at any hardware store. The next time you drill. Grind a flat on the drill shank, long enough to cover both screws. About 3/16 wide. For the set screws. Tighten good. You will have no more trouble.

does it have magnetic holder?

No, there is not a magnet. It uses set screws that can be tightened with the Allen Wrench that they provide with the extension.

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Bosch DSBE1012 12 In. Daredevil® Spade Bit Extension

Product ID: 1097091

Details

Cutting Angle String
12 Degrees
Cutting Diameter
2 Inches
Finish Type
Black Oxide
Material
Alloy Steel
Shank Type
Hex

⚡Drills 2.4x faster with 53% less force

📏12-inch extension length

🔩1/4-inch hex shank for secure fit

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₱1274

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Sold byAmazon PhilippinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Drill smarter, faster, and stronger with Bosch Daredevil® – the extension pros trust!

SLIP FREE POWER - Hex power groove design minimizes slippage, ensuring maximum torque transfer and control.
PRO GRADE DURABILITY - Crafted from alloy steel with a black oxide finish for long-lasting performance and corrosion resistance.
EFFORTLESS EFFICIENCY - Up to 10X faster than conventional spade bits, saving you time and energy on every project.
PRECISION SPEED MASTERY - Full-cone threaded tip pulls through material effortlessly, reducing vibration and boosting drilling speed.
EXTENDED REACH ADVANTAGE - 12-inch straight extension lets you tackle deep, hard-to-reach drilling jobs with ease.

The Bosch DSBE1012 12-inch Daredevil® Spade Bit Extension features a 1/4-inch hex shank with a full-cone threaded tip and hex power groove, enabling 2.4 times faster drilling with 53% less force compared to competitors. Designed for professional-grade durability and precision, it extends your drill’s reach while reducing slippage and vibration for superior hole quality.

Specifications

ASIN	B002BYOWKM
Best Sellers Rank	#105,425 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #218 in Jobber Drill Bits
Brand Name	Bosch
Customer Reviews	4.5 4.5 out of 5 stars (3,136)
Cutting Angle String	12 Degrees
Cutting Diameter	2 Inches
Finish Types	Black Oxide
Global Trade Identification Number	00000346390520
Included Components	1 Bit
Item Length	1.75 Inches
Item Type Name	Drilling Accessories
Item Weight	0.01 Pounds
Manufacturer	Bosch
Material Type	Alloy Steel
Minimum Bore Diameter	2 Inches
Model	DSBE1012
Number of Flutes	1
Part Number	DSBE1012
Point Style	threaded tip
Set Name	Single Item
Shank Type	Hex
Surface Recommendation	Steel,Wood
Tool Flute Type	Straight
UPC	000346390520
Unit Count	1.0 Count
Warranty Description	See Manufacturer's Website

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