Sizes: 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" Minimum/Maximum Length: 90/140mm Drop-forged Chrome Vanadium steel combination spanners. Hardened, tempered and nickel chrome plated for corrosion resistance. Fully polished mirror finish. Open end and twelve-point WallDrive® ring combination. Supplied in storage/carry rack.