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

⚡2.4x faster drilling with 53% less force

📏12-inch precision extension

🔩1/4-inch hex shank with power groove

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NT$516

Duties & taxes included

In stock

Sold byAmazon TaiwanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Drill faster, work smarter — own the job site with Bosch Daredevil!

PRO GRADE DURABILITY - Crafted from alloy steel with black oxide finish for lasting strength
FULL CONE THREADED TIP - Pulls through material smoothly with less vibration
SLIP FREE POWER GROOVE - Hex shank design reduces slippage for maximum control
SPEED DEMON PERFORMANCE - Drills 2.4x faster with 53% less force than competitors
EFFORTLESS PRECISION EXTENSION - 12-inch straight extension for deep, accurate drilling

The Bosch DSBE1012 12-inch Daredevil® Spade Bit Extension features a 1/4-inch hex shank with a power groove to reduce slippage, a full-cone threaded tip for smooth material pull-through, and drills 2.4 times faster with 53% less force than leading competitors. Designed for professionals, it delivers precision, speed, and durability in a sleek alloy steel build with a black oxide finish.

Specifications

ASIN	B002BYOWKM
Best Sellers Rank	#94,734 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #202 in Jobber Drill Bits
Brand Name	Bosch
Customer Reviews	4.5 4.5 out of 5 stars (3,137)
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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