Made from precision ground, finest quality tool steel.

Exacting size & concentricity tolerance.

Will fit almost all standard aircraft counterbores.

Great For Limited Access Areas

53-29 -- 16 Piece Short Series Kit:
Five Counterbores (1/4", 5/16", 3/8", 7/16" & 1/2"), Eight (3/32" Shank: 1/8", 5/32", 3/16" & 1/4" - 1/8" Shank: 3/16", 7/32", 1/4" & 5/16"), Wrenches & Polyethylene Case

53-39 -- 40 Piece Short Series Kit:
Thirteen Counterbores (1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16" & 1"), Twenty Pilots (3/32" Shank: 1/8", 5/32", 3/16" & 1/4"- 1/8" Shank: 3/16", 7/32", 1/4", 9/32" & 5/16" - 3/16" Shank: 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32" & 1/2"), Wrenches & Polyethylene Case

Short Flute Type

Used with chucked drills to cut flat area around hole for bolt or nut installation.

The OD is precision ground with back taper to ensure concentricity.

Carbide tip recommended for hardened or composite materials.

Note: Supplied without corner radii. Corner radii available on special request (please inquire).