100-N/7 Dremel Single Speed Rotary Tool Kit with 7 Accessories features a single speed control for full-time 35,000RPM operation and is SGL Speed Moto Tool. 100-N/7 Dremel 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. 100-N/7 Dremel Single Speed Rotary Tool Kit with 7 Accessories has a lightweight design for comfort during prolonged use.