#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.
Microstop Countersink, 1/4" Shank, 1/4x28 Female Thread. Fits any air or electric drill. Accepts rivet shaver bit or pilot cutter up to 1/2" diameter. Overall length: 2".
#30 Pilot, 1/2" Diameter. 1/4x28 Thread. 3 flute, 100 degrees. Integral (fixed) pilot for cutting accuracy. High Speed Steel. Suitable for 1/8" riveting.
#12 Pilot, 1/2" Diameter. 1/4x28 Thread. 3 flute, 100 degrees. Integral (fixed) pilot for cutting accuracy. Suitable for 3/16" riveting, or 10-32 AN507 Screws. High Speed Steel.
Dia. Of cut: 3/32" to 1/4". 1/4" shank. 100 degree cutter. High Speed Steel. The "zero flute" design is a single hole drilled through the head of the cutter, which makes it virtually chatter-free.
3/8" Diameter 100 degree, 3 flute, countersink cutter with integral #40 Pilot. Fits all 1/4x28 Threaded adapters. Made of hardened high speed steel (HSS).