Proxxon Pen Sander PS 13, 12-Volt (28 594)NOTE: Requires a separate power source: Proxxon transformer NG 2 S, #38706 Superfine sander with linear (not rotary) sanding motion Ideal for surfaces, slots and tight corners Four sanding attachments with straight shanks and four with angled shanks included Three sheets of preprofiled adhesive sanding pads included, 180, 240 and 400 grit This superfine sander with linear sanding motion (versus rotary or orbital) is ideal for surfaces, slots and tight