Putnam 1-1/8" square end mill, 2-flute, with a 3" length of cut, 5-1/2" overall length, and a 1" shank. The square-end geometry provides true 90-degree corners for pockets, slots, and flats in milling operations. With a 1" shank, this tool fits standard 1" toolholding setups, making it compatible with common milling machines and holders for general milling tasks requiring a square profile.
