High performance Cr-Mo alloy steel Phospathed finish To be used with machines To be used with safety spring Dynamic-drive profile to protect nuts High density polyethylene box Standards: UNE16507, DIN 3129, ISO 2725 9 units 1/2" impact sockets mm, 8 mm, 10 mm, 12 mm, 14 mm, 17 mm, 19 mm, 22 mm, 24 mm, 27 mm, 167-XX-1