Sidchrome 1/2" Drive Metric 21 Piece Socket Set Detection Box With Dual Function Rotator Ratchet SCMT14151Sidchrome 1 2" Drive Metric 21 Piece Socket Set Detection Box With Dual Function Rotator Ratchet Sidchromes unique Detection Box holds sockets, tools and accessories firmly in place and allows for instant identification of missing product, even when the box is closed. It reduces the risk of forgetting a socket, tool or accessory in a machine or an engine after servicing and reduces the risk of accidents. Set Includes 17 Metric Sockets: 8, 10, 11, 12,