The 11 amp 4-1/2 in. small angle grinder (Trigger grip, no-lock) delivers up to 3X more durability and up to 50% more power than the competition. With a 1,400 MWO motor that powers through the toughest jobs, the 6121-31 is the perfect match for industrial users. Milwaukee's electronic advantage includes overload protection to maximize motor life, an electronic clutch that extends tool life and helps prevent bind-up, line lock-out that prevents automatic start-up after power loss, and soft start. Featuring a 100% tool-free design, this grinder allows the user to change all accessories, including hubbed product, without a wrench. in addition, the tool-free, burst resistant, adjustable guard allows users to make quick guard installations and adjustments.