1/4 2 flute , HSS Square Single End, Center Cut, 3/8 Shank, 5/8 LOC x 2-1/2 OAL
This is a 1/4 inch 2 flute, high-speed steel square single end, center cut, 3/8 shank tool with a 5/8 inch locator and 2-1/2 inch overall length, featuring 45 flutes and used for aluminum finishing.