21pc 3/8" Drive Drain Plug Key Set. 16 litre Oil Drain Pan. Made from Heat Treated And Hardened Steel. SQAURE DRIVE KEY SOCKETS - 10mm. HEX KEY SOCKETS - 8mm - 9mm - 10mm - 12mm - 14mm - 17mm. SQUARE KEY SOCKETS - 5/16" - 3/8" - 7mm - 8mm - 10mm - 11mm - 12mm - 13mm - 14mm.