Comprehensive socket and bit set, manufactured from Chrome Vanadium and S2 material includes two 72 teeth ratchets in 1/4\"D and 1/2\"D. Sockets manufactured from Chrome Vanadium, bits manufactured from S2 steelIncludes 17 x 1/4\"D Bits, 1 x Socket Adaptor and 15 x Assorted 10mm shank bits and 4 x Hex Keys. 18 x Standard Sockets 1/2\"D: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 27mm, 30mm, 32mm4.  x Deep Sockets 1/2\"D: 14mm, 15mm, 17mm, 19mm. 2 x Spark Plug Sockets: 16mm, 21mm. 13 x 1/4\"D Sockets: 4mm, 4.5mm, .5mm, 5.5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm. 8 x 1/4\"D deep sockets 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm. 1/2\"D Accessories: Ratchet (72 teeth), Extension bar with 3/8\"D 10mm Bit Adaptor. 1/4\"D Accessories: Ratchet (72 teeth), Socket Driver, 2 x Extension bars (100mm and 50mm), 1 x Flexible Extension bar, 1 x Sliding T Bar, 1 x Universal Joint.