Replacement Drill Bits for Quick Change Countersinks and Modular 4-in-1 Drill and Driver. Adjustable drill bit length for desired screwed depth and features a flattened shank for a no-slip countersink connection.Features:#10/12 screw size, 1/8″ pilot holePrecision ground with flattened shank to prevent “spin-out”Includes two drill bits and two set screws to secure in the countersinkWhat’s Included:(1) Replacement Compact Drill Bits -#10/12
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