Used to extend threaded drill bits, pilot cutters, or any other cutter with a 1/4-28 thread. Has a 1/4" Hex Drive on the shank end to fit a drill or screwdriver, and a 1/4-28 internal (female) thread at the other. 2" extension length. 1 lbs (0.5Kg) shipping weight.
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#40 Pilot, 1/2" Diameter. 1/4x28 Thread. 3 flute, 100 degrees. Integral (fixed) pilot for cutting accuracy. High Speed Steel. Suitable for 3/32" riveting.
3/8" Diameter 100 degree, 3 flute, countersink cutter with integral #30 Pilot. Fits all 1/4x28 Threaded adapters. Made of hardened high speed steel (HSS).