3M ™ Orbital Sanders - Original Series are designed to maximize finishing performance on flat surfaces. Its 3 x 4 Inch work face easily gets into corners and angles to deliver an exceptionally smooth, flat, professional surface on metal, wood, composites and advanced materials. Air-powered 3M ™ Orbital Sanders - Original Series are available in three vacuum styles, with accessories. 3M ™ Hookit ™ back-up pads are perfectly mated for use with hook-and-loop style3M ™ Hookit ™ sheets. They're ideal for work spaces where adhesive backed discs may become contaminated by dust, dirt or flying debris. The 3M ™ Hookit ™ attachment system allows you to easily attach, detach and reattach the abrasive, thus utilizing the entire life of the sheet, resulting in less shop waste. Ideal For Flat Surface Finishing And Sealer Sanding Compact, Lightweight With A Grip From The Top Design For Less Fatigue Precision-Balanced And Designed For Smooth Operation Pneumatic Power Provides Hours Of Continuous Use, Far Exceeding Standard Electric Sanders Three Models: Non Vacuum, Central Vacuum-Ready And Self-Generated Vacuum Limited 1 Year Warranty