Harvey Tool 956410-C3 | 0.1562" (5/32) Diameter x 0.1875" (3/16) Shank x 0.7500" (3/4) LOC x 3.0000" (3) OAL x 3 Flutes AlTiN Coated Carbide Square End MillOptimized for deep cavity and deep pocket milling applications, Miniature End Mills Square Long Reach, Long Flute feature a reduced neck diameter to avoid heeling, center cutting geometry, and solid carbide construction. Long length design for deep cavities Long flutes for deep pocket milling CNC ground in the USA Center cutting Solid carbide Product Specifications Tool Number 956410 C3 Cutter Diameter (Inch) 0. 1562" (5 32) Neck Diameter (Inch) 0.