UNLIMITED DRIVING POTENTIAL: Multi-purpose adapter makes the sockets compatible with the Klein KNECT system DEEP WELL IMPACT SOCKETS: Set includes 20 sizes within 10 color-coded sockets, adapters and extended shaft for added versatility 10 COMBINATION SOCKET SIZES: 1/4 x 5/16, 3/8 x 7/16, 1/2 x 9/16, 5/8 x 3/4, and 11/16 x 13/16 inch socket sizes and 8 x 10, 9 x 11, 12 x 14, 13 x 15, and 16 x 18mm QUICKLY CHANGE SOCKETS: Six smaller sockets 1/4-Inch to 9/16-Inch (8 to 14mm) are stackable on Cat. No. 650QSAL reducing the number of tools required KLEIN KNECT COMPATIBLE: Specialized square drive adapter for seamless compatibility with the Klein Tools pass through socket wrench (Cat. No. 65400) and any 3/8-Inch square drive ratchet SMALL PARTS STORAGE TRAY: Secure loose fasteners, washers and extra bits, stored inside the case COMPATIBLE WITH MODbox: Connects with other MODbox cases of similar design for a customized mobile workstation tailored to your needs