The ShopSeries RC4151 finishing sheet sander has an aluminum base for exact flatness and long lasting durability. Spring loaded paper clamps secure all types of paper. Sealed rocker switch resists wear, and the dust collector ensures a cleaner working environment. The soft grip handle is comfortable for prolonged useage. Specs: Voltage: 120V/60Hz, Power input: 2 Amp, No-load speed: 12000 opm, Base size: 4"x4-5/16", Orbital dia: 1/16", Weight: 3.3 lbs. Includes: (1) dust box, (1) dust extraction adapter, (3) sanding paper, (1) punch.