General description Sealey Siegen Imperial Combination Spanner Set includes 11 pieces made from drop-forged Chrome Vanadium steel. These spanners are hardened, tempered, and nickel chrome plated for enhanced corrosion resistance, featuring a fully polished mirror finish. The set includes both open-end and 12-point WallDrive® ring combination spanners, and is supplied in a convenient storage/carry rack. Technical specifications Material: Drop-forged Chrome Vanadium steel Sizes: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" Model No.: S0857 Lifetime guarantee* Other information Part of the Siegen by Sealey range of quality tools at competitive prices.