Insert-ring ratchet wrenches, inch sizes. Standards: ISO 1711-1 and DIN 3113. Material: high-alloy quality steel. Wrench head 15 deflected with thinner head for better accessibility. Ratchet in the ring for high productivity application. 5 Action Angle. Twelve-sided Dynamic-Drive profile for longer life of screws and nuts. Convenient changeover button for change direction of rotation: left/right. Larger and two-sided size indicator for quick recognition. Chrome-plated matte polished for high quality surface finish.