9100-21 Dremel 2.5AMP Fortiflex Powerful Shaft Rotary Tool Kit 9100-21 Dremel 2.5AMP Fortiflex Powerful Shaft Rotary Tool Kit is powered by a 2.5V motor providing high torque at low speeds and can be used as an engraver, detail sander, glass etcher and mini polisher. 9100-21 Dremel 2.5AMP Fortiflex Powerful Shaft Rotary Tool Kit features precision hand piece for better control and comfort for extended use and its patented bearing system means better durability and cool operation. 9100-21 Dremel 2.5AMP Fortiflex Powerful Shaft Rotary Tool Kit features a 3-Jaw Chuck enhancing versatility and can be used with all Dremel tool accessories.