ZERO FLUTE PILOT CUTTER
Part Number: 4100-21
#21 Diameter, 1/4-28 thread. The unique "high-hook" design of these countersink cutters allows smooth, easy cuts with virtually no chatter. Body diameter is 1/2. They will fit into a stop countersink or they can be used directly with an angle drill. 1 lbs (0.5Kg) shipping weight.