DeWALT 4-1/2"(115mm)- 5" (125mm) High Performance Trigger Switch Grinder. The DWE43115 4-1/2"(115mm) / 5"(125mm) High Performance Cut-Off/Grinder with E-Clutch® 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.