M18 FUEL 4-1/2 in, 5 in angle grinder delivers 8500 rpm to provide the power to complete the toughest grinding and cutting applications M18 FUEL 4-1/2 in, 5 in grinder has an electronic clutch for kickback protections and overload protection to maximize motor life The M18 FUEL 3/8 in compact impact wrench has a 4-mode DRIVE CONTROL to provide greater control over output speed and power, includes auto shut-off and bolt-removal mode REDLINK PLUS intelligence ensures maximum performance and protects from overloads, heating and over-discharge Compatible with all M18 batteries and chargers