SM ARNOLD VELOCITY DX 7". Fits 5 3/8" backing plate. S.M. Arnold 49-017 7" Velocity DX Foam Pad - Blue - Heavy Cutting Pad. S.M. Arnold 83-061 Cordless Drill Brush - Heavy Duty (Red Bristle). High Density Foam Pad manufactured to perform exceptionally well with Long Throw Gear Driven, Rotary and DA Machines.