Tool Extensions | McMaster-Carr

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Square Drive Size Adapter

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For Drill Bit Shank Type

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Magnesium Phosphate Coated

For End Mill Shank Diameter

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For Drill Bit Shank Size

DFARS Specialty Metals

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Compliant with Exemptions

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Shank Diameter

Thread Size

Drive Style

For Number of End Mill Milling Ends

For Use On

538 Products

Fabricating and Machining

End Mill Extensions

Lengthen the reach of your end mill

5 products

Drill Bit Extensions

Expand the reach of drill bits to get into deep and hard-to-reach spots

121 products

Countersink Extensions

Lengthen the reach of threaded-shank countersinks

3 products

Tap Extensions

Extend the length of your tap to cut in hard-to-reach areas

15 products

Tap and Die Wrench Sets

Switch between internal and external threading with interchangeable tap and die adapters

1 product

Hole Saw Arbor Extensions

Reach your hole saw into spots where your drill is too big to fit

2 products

Drill Chuck Arbor Extensions

Lengthen the reach of your drill chuck arbor

10 products

Fastening and Joining

Socket Extensions

Lengthen sockets to turn hard-to-reach fasteners

190 products

Wrench Handles

Generate extra torque to loosen stubborn fasteners; also known as breaker bars

1 product

Box Wrenches

Grip all sides of a fastener to prevent slipping

20 products

Adjustable Wrenches

Adjust the jaws to fasten different size nuts, bolts, or workpiece

1 product

Sockets

Turn fasteners with an external drive style without slipping and damaging the drive

20 products

Ratchet Wrenches

Adjust fasteners in tight spaces without removing and repositioning the wrench

11 products

Combination Wrenches

Use the open end when tightening in cramped spaces and the box end when you need extra grip

13 products

Binding Barrels and Screws

Thread together for a low-profile fastener

113 products