Wheel Diameter: 4-1/2" And 5"Material: Plastic And MetalToolless Installation Is Compatible With 1800, AG And GWS Series 4-1/2" And 5" Small Angle Grinders (Excluding GWS8-45 And GWS9-45)Dust Collection Reduces Clean-Up Time And Provides Cleaner, Safer Air For UserLarge, Durable Foot Plate Greatly Increases Stability During Use For Clean And Accurate CutsSingle Screw Depth Adjustment Quickly Adjusts And Maintains Desired Depth Of CutBosch AIRSWEEP Vacuum Compatible, Plug And Play Without Using Any Adapters