Professional Quality, manufactured from chrome vanadium steel hardened, tempered and chrome plated for corrosion protection. Packed in heavy gauge steel storage case with plastic insert. Contents: 4 x Hexagon sockets: 6, 7, 8, 9mm, 11 x Bi - hexagon sockets: 10, 11, 13, 14, 15, 16, 17, 18, 19, 21, 22mm, 1 x Reversible ratchet with Quatrolit® ; soft grip handle, 1 x Extension bar: 150mm, 1 x Sliding 'T' bar Manufactured to DIN 3120/ISO 1174, DIN 3122/ISO 3315, DIN 3123/ISO 3316 and DIN 3124/ISO 2725 Specifications