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10mm Screw Machine Drill Bit

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This drill bit is for drilling the large selector hole on the right side of the receiver. This makes the larger side of the keyhole.  Get our 7/32 drill bit for the smaller hole.

US Made by Interstate

Screw Machine - Drills Size: 0.3937 In., 10.00 mm

Finish/Coating: Black Oxide


Point Angle°: 118