The DWE4224 4.5" Small Angle Slide Switch Grinder with Brake slows wheel 50% faster once trigger is released as compared to the DWE402 with DW4514 Wheel. The E-Clutch™ feature activates in less than a tenth of a second when a wheel pinch/stall event is detected. Includes One-Touch™ Guard and Dust Ejection System.