The DWE46103 6"(150mm) High Performance Tuckpoint Grinder with Shroud has E-Clutch which 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-OffAdvanced Overload Protection and the includes the dust extraction shroud for tuckpoint and cutting applications.