Kincrome Ball Point Long Series Hex Key Set. High quality Chrome Molybdenum Steel (Cr-Mo), hardened, chrome plated and powder coated (polished and chamfered). Size range; 1/16 x mm, 5/64 x 100mm, 3/32 2mm, 1/8 x 126mm,5/32 x 1 , 3/16 x160mm,1/4 x 180 5/16 x 200mm, 3/8 x 224mm