Milwaukee 21-mm Metric Combination Wrench features a MAXBITE™ Open-End Grip that enhances the wrench's hold on nuts and bolts, providing users with 25% more torque d to traditional smooth-faced wrenches. Its ergonomically designed I-Beam handle ensures improved comfort during use, while the ink-filled size labels allow for quick and easy tool identification. This combination of innovative design and functionality makes it an essential tool for both professional and DIY projects. Model Number: 45-96-9521