The superfine sander with linear sanding motion (as opposed to rotary or orbital) operates at 8,000 strokes per minute with a 2.5 mm stroke. Stable housing of fibreglass reinforced POLYAMIDE. It is ideal for surfaces, slots and tight corners. Four sanding arbors of different shapes as well as 3 sheets of pre-profiled self-adhesive sanding pads are included. The sheets are of grits 180, 240 and 400 with 5 of each shape per sheet.Note: A mains adapter of at least 12 - 18 V DC is required. We recommend MICROMOT power supplies NG 2/E or NG 5/E. The electronic speed control on these units allows the selection of different speeds for different applications and materials.