• HSS, Hardened•Contains:1/4″ – 1-3/8″ x 10 steps3/16″ – 7/8″ x 12 steps1/4″ – 3/4″ x 9 steps1/8″ – 1/2″ x 13 steps3/16″ – 1/2″ x 6 steps•Titanium coating surface•Packing: aluminium case with color box