The Heavy-Duty Round Shaft Keystone Cushioned-Grip Screwdriver has a cushion-grip handle that is resistant to oil, gas and water, and helps to prevent slippage for greater torque and superior comfort. They feature nickel chrome plated vanadium steel heavy-duty square shanks and offer wrench-assisted turning. It has a cross-ground black oxide finish tip to provide a precise and secure fit in the screw slot. The handle ends are all color-coded for quick and easy identification. Screwdriver meets ASTM F1505-01, EN, DIN and IEC 60 900-test standards.