Dremel 100-N/7 Single Speed Rotary Tool Kit with 7 Accessories features a single speed control for full-time 35,000RPM operation for material such as wood or metal and is SGL Speed Moto Tool for convenience of full-speed applications such as cutting, sharpening, drilling, etc. Dremel 100-N/7 Single Speed Rotary Tool Kit with 7 Accessories features a cool-running ball bearing construction for smooth and quiet operation and replaceable motor brushes extending tool life. Dremel 100-N/7 Single Speed Rotary Tool Kit with 7 Accessories has a lightweight design for comfort during prolonged use.