The DWE43131 4-1/2 In.(115 mm) / 5 In.(125 mm) high performance cut-off/grinder with e-clutch shuts the grinder off when a wheel pinch or wheel stall occurs, extending the life of the gears and motor. Dust ejection system; technology clears dust and debris for extra protection. Power tool shuts off before overheating with power-off advanced overload protection.