Guhring Drivematic 3/16" Countersink Drill Bits  1/4" Threaded Shaft 2 Count

These  are new ,never used bits in original tubes. The drill bit is 3/6" , countersink  to 1/2" .

1/4" threaded shafts for use with drivematic drills .Can also be used with countersink stops and any aircraft and pancake drill that accepts  1/4" threaded headbits.

Hard to find new bits.