Snap-on wrenches are manufactured with special alloy steel, precision forged and heat treated for optimum strength and durability. The Flank Drive box end wrenching system grips the fastener flats and provides up to 15 to 20 percent more turning power. Nickel chrome finishing helps protect against corrosion and makes it easy to wipe clean. Longer length handles provide increased leverage and better access to those hard to reach areas.