5/16 (90°) 4FL Solid Carbide Countersink 3/8 x 2-1/2

Description

5/16 (90°) 4FL Solid Carbide Countersink 3/8 x 2-1/2 — Countersinks are precision cutting tools designed to create chamfers, deburr edges, and prepare holes for flat-head fasteners. 0.3125″ cut dia, 4-flute, Sub-Micron Grain Carbide, 2.5″ OAL.