Part Number: 045242309399 Part: Milwaukee 2781-20 M18 FUEL 4-1/2" - 5" Grinder, Side Switch Lock-On Grinder/Cut-Off, M18, Cordless, RPM: 8500, Wheel Diameter: 4-1/2", Voltage: 18, Weight: 5. 8 lbs, Includes: Flange Nuts, Wheel Guard, Spanner Wrench, Side Handle, Grinder/Cut-Off Tool. Volts DC: 18 Type: Cut-Off Tool, Charger, Grinder, Kit Also known as: 045242309399, grinder, m18, cordless, no lock, MIL278120, Milwaukee, 2781-20, Grinders, Electric Saws & Grinders, Cordless Tools, Tools, Testing, Meters Equivalent to: