1" long bristle pad driver securely holds pads in place. Use with the Pad Grabber pad centering and retaining device for secure holding and quick release of pads. Plastic block insures no splitting, cracking or warping. In general, a pad driver should be 1" less than the diameter of the undercarriage of the rotary machine. Choose your brush size below and then use the drop-down menu to pick your machine make and model. 1lonypaddrbr 10" Nylon Rotary Pad Drive Brush (1" Bristle, Clutch Plate Included) Regular price: $47.24 Sale price: $42.51 11" Nylon Rotary Pad Drive Brush (1" Bristle, Clutch Plate Included) Regular price: $49.84 Sale price: $44.85 12" Nylon Rotary Pad Drive Brush (1" Bristle, Clutch Plate Included) Regular price: $53.80 Sale price: $48.42 13" Nylon Rotary Pad Drive Brush (1" Bristle, Clutch plate included) Regular price: $60.33 Sale price: $54.30 14" Nylon Rotary Pad Drive Brush (1" Bristle, Clutch plate included) Regular price: $66.92 Sale price: $60.23 15" Nylon Pad Driver Brush (1" Bristle, Clutch Plate Included) Regular price: $72.15 Sale price: $64.94 16" Nylon Pad Driver Brush (1" Bristle, Clutch plate included) Regular price: $81.32 Sale price: $73.18 17" Nylon Rotary Pad Driver Brush (1" Bristle, Clutch plate included) Regular price: $89.21 Sale price: $80.29 18" Nylon Rotary Pad Drive Brush (1" Bristle, Clutch plate included) Regular price: $94.44 Sale price: $85.00 19" Nylon Rotary Pad Drive Brush (1" Bristle, Clutch plate included) Regular price: $103.64 Sale price: $93.27 20" Nylon Pad Drive Brush (1" Bristle, Clutch plate included) Regular price: $109.66 Sale price: $103.89 PAD GRAB Universal Rotary Floor Machine Pad Holder Regular price: $28.30 Sale price: $26.10