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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🚀 Drill Deeper, Work Smarter: Dare to Extend Your Limits!

SLIP FREE POWER - Hex shank power groove minimizes slippage, ensuring maximum torque transfer every time.
EXTEND YOUR REACH - 12-inch extension lets you tackle deep, hard-to-reach drilling jobs with ease.
PRECISION CLEAN CUTS - Spur and reamer tips deliver cleaner holes with reduced breakout—professional finish guaranteed.
BUILT FOR SPEED STRENGTH - Full cone threaded tip accelerates drilling speed while maintaining durability under pressure.
VERSATILE MATERIAL COMPATIBILITY - Engineered for wood, plastics, fiberglass, and more—your all-in-one drilling companion.

The Bosch Daredevil PSBE1012 12-inch drill bit extension is a high-speed steel accessory designed to enhance your drilling capabilities. Featuring a 1/4-inch hex drive and a power groove to reduce slippage, it ensures secure, efficient torque transfer. Its spur and reamer tips provide cleaner holes with less breakout, making it ideal for wood, plastics, and fiberglass. Engineered for professionals who demand speed, precision, and durability on every job.

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Material	High Speed Steel (HSS)
Finish Type	Silver
Shank Type	Straight
Cutting Angle String	135 Degrees
Tool Flute Type	Spiral
Point Style	Brad Point
Surface Recommendation	Wood, Engineered Wood, Pine, Plastic, Acrylonitrile Butadiene Styrene, Polyvinyl Chloride, Nylon, Fibreglass
UPC	000346390520
Net Quantity	1.0 Count
Global Trade Identification Number	00000346390520
Manufacturer	bosch
Model number	DSBE1012
Item Weight	136 g
Item model number	DSBE1012
Power Source	corded electric
Are batteries included?	No

Bosch Daredevil PSBE1012 12-Inch Drill Bit Extension

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