This 1/4 "" Ratchet Socket Tool Kit is made of chrome vanadium steel, with a mirror chrome finish for abrasion resistance and a ratchet with rubber grips for added grip comfortable. 21 bit sockets: 6 Torx hex sockets (T10 / T15 / T20 / T25 / T30 / T40), 6 flat head hex sockets (H3 / H4 / H5 / H6 / H7 / H8), 3 slotted sockets (S4 /S5.5/S7), 3 Philips bit sockets (PH1 / PH2 / PH3), 3 Pozidriv sockets (PZ1 / PZ2 / PZ3). 13 1/4 "" metric hex sockets: 4-4.5-5-5.5-6-7-8-9-10-11-12-13-14 mm; 3 Allen keys L: 1.5-2-2.5 mm. The other 17 pieces of 46 pieces include: 1 1/4 "" universal joint, 1 flexible 1/4 "" extension bar, 2 1/4 "" (50 mm, 100 mm) extension bars, 1 bar 1/4 "" sliding T, 1 quick release ratchet, 1 6 inch twist grip, 1 bit adapter, 1 blow tool box. 46 sockets can be used to tighten or loosen most bolts, nuts, screws for automotive, mechanical, motorcycle maintenance, etc. This Ratchet Wrench Repair Tool Kit is perfect for DIY enthusiasts, repairers, construction workers, mechanics, and also a great ratchet repair tool set to have around the home, garage, and out of town. the workshop.