The Tonisco Jr. Electric Drive Unit is designed to produce the turning motion for the Jr. Hot Tap Drills. The drive unit is a normal 220-240V or 110V power drill that operates in 50-60Hz. Input power 1300W with a 13mm chuck gives enough power for drillings form DN20 (3/4″) up to DN100 (4″). Two-speed gear box with a thumb wheel speed selection for easy operation. The Jr. Electric Drive Unit has a thumb wheel speed preselection and a two-speed gear box. It has a variety of different speeds and enough power to maintain a constant turning motion. It has an overload protection for safe use.