The Capri Tools Kontour Nut Driver Set is forged from Chrome Vanadium steel to give you ultimate performance and durability. It is equipped with full length 3 in. L hollow shaft which works perfectly on both regular and long bolts. The Kontour handle is shaped to fit the curvature of you hand, giving you a powerful and Ultra-comfortable grip. The Kontour handle is covered in alternating soft and hard layers, in a hybrid pattern designed to strike the perfect balance between high speed turning and high torque transfer, giving you a sure grip while letting you quickly shift in between turns. Anti-toll design helps the driver stay where you leave it and won't roll away. Hanging hole at the top the handle lets you use standard hooks for organization and storage. Set of 7 nut drivers in SAE hex sizes: 3/16 in., 1/4 in., 5/16 in., 11/32 in., 3/8 in., 7/16 in., and 1/2 in.