The Snap-on Industrial Ratcheting Wrenches deliver up to 20 percent more ultimate torque and 95 percent additional cycle life. These non-reversible ratcheting wrenches are engineered with a zero degree offset, uni-directional design to deliver more power in less lateral space. The new ratcheting wrenches are available in SAE and Metric sizes and are manufactured from special alloy steel, precision-forged and heat-treated for optimum strength and durability.