22821Step Keystock 3/16 x 1/4 Supplied in 12” lengths only. Cold-drawn C-1018 steel. Zinc plated finish. Rockwell “C” hardness: 60. Thickness tolerance ± 0.1 mm; length tolerance ± 0.1 mm. Step Width: 3/16”, Step Height: 3/32”Width: 1/4”, Height: 3/32”, Package Quantity: 2