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. Dust Ejection System technology clears dust and debris for extra protection. Power tool shuts off before overheating with Power-Off®Advanced Overload Protection and the includes the dust extraction shroud for tuckpoint and cutting applications.