5/32" Pilot Dia., 3/32" Shank. Fits 4000 series counterbores.

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).

Dia. Of cut: 1/8"to 27/64". 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 #30 Pilot. Fits all 1/4x28 Threaded adapters. Made of hardened high speed steel (HSS).

5/16" Diameter. Overall length 1.19". Solid carbide tip for long life. 1/4X28 thread. Fits standard microstops

.375 Dia., 1/4" Shank. 3 flute countersink. High speed steel. Three flute design. Made of High Speed Steel

3/8" Diameter 100 degree, 3 flute, countersink cutter with integral #21 Pilot. Fits all 1/4x28 Threaded adapters. Made of hardened high speed steel (HSS).

Aircraft Counterbore, 1/2" Dia., 1/8" Pilot Hole, 2-3/4" Len. Made of High Speed Steel. Requires 1400P series pilot.

#30 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. Suita

#40 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. Suita

Use this microstop in those tight areas that can't be reached by a standard cage. It's only 1-3/8" long, and threads onto any drill with a 1/4-28 threaded shaft. Features bronze bearings.

Aircraft Counterbore, 7/16" Dia., 1/8" Pilot Hole, 2-3/4" Len. Made of High Speed Steel. Requires 1400P series pilot.