The Grainger Approved Square End Mill Single End is a high-speed steel end mill with a square end for milling slots, keyways, and pockets. It has a 1/2" shank diameter, a 1-1/2" overall length, and a 1/2" cutter diameter. The number of flutes is 2. This end mill is uncoated and made in the USA. The primary applications are slotting, side milling, and profiling. It can machine low carbon steels at surface speeds up to 120 SFM.