18v, lxt, 4-1/2", lithium-ion, brushless, cordless angle grinder, tool only, no battery or charger included, automatic speed change technology adjusts speed & torque during operation for optimum performance, active feedback sensing technology turns the motor off if rotation of the wheel is suddenly forced to stop, brushless motor eliminates carbon brushes, enabling motor to run cooler & more efficiently for longer life, brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge, electronically controlled brushless motor efficiently uses energy to match torque & rpm to the changing demands of the application, includes: 5" x 1/4" x 7/8" grinding wheel, 5" ultra thin cut-off wheel, side handle lock nut wrench, 5" cut-off wheel guard &5" tool-less wheel guard.