Dremel 4000 Series 28 Piece 1.6A Corded Electric Variable Speed Rotary Tool Kit (Certified Refurbished) This Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer. Powerful motor delivers smooth performance at variable speeds from 5000 to 35,000 RPM Slim, ergonomic body provides a 360 degree grip zone in every position for improved precision Works with standard attachments as well as high performance level attachments Electronic feedback circuitry maintains consistent power at lower and mid-range speeds