Cr-V steel Forward / reverse switch Quick release safety button 48 Teeth Ratcheting Head The Kincrome Mirror Polish Ratchet range comes in 1/4" Drive, 3/8" Drive, and 1/2" Drives. Manufactured from Chrome Vanadium Steel, hardened and tempered to meet Kincrome quality specifications, the full metal design works to fit the hand of a typical user. With a reverse switch and quick release safety button, the Kincrome Ratchets come with the Kincrome lifetime guarantee.