20-Piece SAE Standard/Deep Socket SetEach ratchet handle is ergonomically designed and has an easy-to-use, thumb operated reverse-switch mechanism. Stanley® sockets employ the Maxi-Drive™ system: the socket contacts the fastener away from the corner. This system allows 15% more torque to be applied. Drive Size: 3/8 in; Finish: High-Polish Chrome; Includes: (9) Std. Sockets 3/8 - 7/8 in, (8) Deep Sockets 3/8 - 13/16 in, (2) Extensions, Ratchet, Blow Molded Case; Material: Forged Steel; Measuring System: Inch; Number of Points: 12; Weight: 5.04 lb.