With two quality bearings and a powerful motor, the new DAVID 550 delivers performance you want from an electric model tool. Whether you are building models or detailing garage kits, the new DAVID 550 flies through the most of difficulty with proper speed and torque. It's a small, handheld pen-like device which has a thumb speed control and it comes with multiple head adapters in various shaped heads. Includes Handpiece, Controller, Handpiece Rest, 0.1mm-1.0mm Precision Collet, Ultra Fine Diamond Burs - 18 pcs, Spare Fuse (1). Specs: Input: AC100-120V 50/60Hz, Fuse: 5.2 x 20mm 1A250V/AC, Speed: 3,500 - 18,000 RPM, Dimensions & Weight: Hand-piece: D32 x L147mm / 192g Controller: L143 x W77 x H67mm / 995g.