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; 1.5mm x 90mm, 2.0mm x 100mm, 2.5mm x 112mm, 3.0mm x 126mm, 4.0mm x 140mm, 5.0mm x 160mm, 6.0mm x 180mm, 8.0mm x 200mm, 10.00mm x 224mm.