This is a multifunctional belt sander, mini portable, low noise, can be used for high-speed steel drill bit rough grinding, blade edging, fine grinding tungsten steel turning tool, polishing Bodhi root, etc., easy to install and operate, is a home DIY tool.Specifications:Material: stainless steelColor: silverType: 1-4 (optional)Type 1: type 15 belt sanderType 2: type 15 belt sander+speed control power sourceType 3: type 25 belt sanderType 4: type 25 belt sander+speed control power sourceVoltage: AC 110-240V Rated voltage: DC 12-24VRotating speed: 4000-9000RPMSpeed control mode: 7 gears adjustableType 15 belt sander belt size: 15 * 330mm / 0.6 * 13.0in (60/80/120/180/240/320/400/600/800/1000 mesh)Type 25 belt sander belt size: 25 * 330mm / 1.0 * 13.0in (60/80/120/180/240/320/400/600/800/1000 mesh)Machine size: 150 * 143 * 140mm / 5.9 * 5.6 * 5.5inType 15 belt sander weight: 1059g / 2.3lbType 25 belt sander weight: 1094g / 2.4lbPackage size: 202 * 190 * 160mm / 8.0 * 7.5 * 6.3inPackage weight:Type 1: 1262g / 2.8lbType 2: 1526g / 3.3lbType 3: 1323g / 2.9lbType 4: 1588g / 3.5lbNote:Type 1 and type 3 need you to prepare DC 12-24V 5A power source by yourself.Package list: (optional)Type 1:1 * Type 15 Belt Sander10 * Sand Belt2 * WrenchType 2:1 * Type 15 Belt Sander1 * Speed Control Power Source10 * Sand Belt2 * WrenchType 3:1 * Type 25 Belt Sander10 * Sand Belt2 * WrenchType 4:1 * Type 25 Belt Sander1 * Speed Control Power Source10 * Sand Belt2 * Wrench