specification material chrome vanadium steel color as picture show measuring system metric sizes 10 11 12 13 14 15 16 17 18 19 mm length approx. 38 mm and 78 mm included 20pcs impact sockets 1 2 10 mm x 22 mm x 38 mm 11 mm x 22 mm x 38 mm 12 mm x 22 mm x 38 mm 13 mm x 22 mm x 38 mm 14 mm x 22 mm x 3