Harvey Tool 755508-C3 | 0.1250" (1/8) Diameter x 0.1250" (1/8) Shank x 0.1870" (3/16) LOC x 2.5000" (2-1/2) OAL 4 Flutes AlTiN Coated Carbide Medium Alloy Steels Ball End MillEnjoy improved performance in contour profiling and tipped multi axis machining with this product offering of Variable Helix End Mills for Medium Alloy Steels Ball Long Reach, Stub Flute, which features a reduced neck diameter to avoid heeling when reaching deep within he cavity of a part. h6 shank tolerance for high precision tool holders Reduced neck diameter to avoid heeling Long reach design for deep cavities CNC ground in the USA Center cutting