Professional Quality, manufactured from chrome vanadium steel hardened, tempered and chrome plated for corrosion protection. Packed in heavy gauge steel storage case with foam insert. Contents: 21 x Bi - hexagon sockets: 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 32mm, 18 x Bi - hexagon sockets: 3/8, 7/16, 1/2, 9/16, 19/32, 5/8, 11/16, 3/4, 25/32, 13/16, 7/8, 15/16, 31/32, 1, 1.1/16, 1.1/8, 1.3/16, 1.1/4", 6 x Bi - hexagon sockets: 3/16, 1/4, 5/16, 3/8, 7/16, 1/2" WW, 2 x Spark plug sockets: 10, 14mm, 1 x Reversible ratchet with Quatrolit® ; soft grip handle, 3 x Extension bars: 75mm, 125mm, 250mm, 1 x Sliding 'T' bar, 1 x Flexible handle, 1 x Universal joint, 1 x Speed brace, 1 x Offset handle, 1 x Converter 1/2" (F) x 3/8" (M), 1 x Drag link socket 19 x 3mm Manufactured to DIN 3120/ISO 1174, DIN 3122/ISO 3315, DIN 3123/ISO 3316 and DIN 3124/ISO 2725 Specifications