This microstop reaches into very confined areas. Extended reach is great for getting down into narrow channels such as seat tracks. Uses 1/4-28 threaded cutters up to 5/8" diameter. Shaft travel is 9/32". Rated at 3000 RPM.

Great package deal featuring our 133 Microstop Countersink plus 4 pilot cutters (1000-100 series) in sizes #40, #30, #21, and #12 all packaged in a custom foam lined case.

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".

Our heavy duty microstop uses ball bearings for ultra-smooth operation. The ball bearing design also makes it run much cooler than a standard microstop. Depth adjustable in 0.001" increments with positive locking collar. Shaft travel is 9/32".

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).

#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.

#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.

Packs all the features of a standard microstop in a slim design that's only 11/16" in diameter. It's ideal for those narrow areas that can't be reached with a standard microstop.

#40 Diameter, 1/4-28 thread. Two fluted 100 degree cutter with a 1/2" body diameter. These cutters excel in cutting highly abrasive material such as Kevlar, and other "difficult to machine" materials.

#21 Pilot, 1/2" Diameter. 1/4x28 Thread. 3 flute, 100 degrees. Integral (fixed) pilot for cutting accuracy. High Speed Steel.

#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.

#30 Pilot, 1/2" Diameter. 1/4x28 Thread. 3 flute, 120 degrees. Integral (fixed) pilot for cutting accuracy. High Speed Steel.