Description: 12 Pcs Set : 8 Pcs long adaptor set +4 Pcs converter set 25mm-73mm 1/4" 3/8" 1/2" socket adapter and 1/4 3/8 1/2 Drive Socket Wrench Adapter Converter, hexagonal , general specifications edge 6.35mm 1/4, /2"（12.5mm），3/8"（10mm），1/4"（6.3mm）connector. Made from rust-resistant chrome-vanadium steel This set allows you to mix and match drive sizes for your sockets, ratchet handles, extension bars and other accessories. Multi-sized adapters are for use with power drills, , and drills to operate wide range of jobs Package Includes: 12Pieces in total. 8PCS Socket adapter: 1/4 * 1/4 * 25mm length 1/4 * 1/4 * 30mm length 1/4 * 1/4 * 50mm length 3/8 * 1/4 * 50mm length 1/2 * 1/4 * 50mm length 1/4 * 1/4 * 65mm length 3/8 * 1/4 * 65mm length 1/2 * 1/4 * 73mm length 4PCS Adapter Converter: 1/2" - 3/8", 3/8" - 1/2", 3/8" - 3/8", 3/8" - 3/8" Note: Please allow slight size errors caused by manual measurements. Please allow slight difference between the pictures and the actual item due to different lights.