This set features durable S2 Chrome Vanadium Steel with a Rockwell hardness of 58 - 62. It includes twelve different style tips, such as security bits, for versatile use. The set comes with a hard case and various bits, including PH, PZ, SL, H, T, Clutch, Cross, Spline, Y Tip, and adaptors. Price drops from $12.98 to $9.98. Free Shipping over $35 or adds $5.99.