Performance Tool M573DB 5" High Speed Sander Compact but powerful 1/2 HP ball bearing motor Contoured grip offers greater control and comfort Built-in air regulator for precise speed control Lightweight and durable aluminum housing Includes three resin fiber backing pads: 3", 4.5", 5.5" Ideal for light sanding, feather edging and rust removal Specifications: Pad diameter: 5", Free speed: 18,000 RPM, Average CFM: 4.2, Air pressure: 90 PSI, Air inlet: 1/4" NPT, Hose size: 3/8" ID, Length: 4.3", Weight: 2.2 lbs