5-stage variable speed control dial for matching the rpm to the work.<VERTICAL_BAR>Super Joint System (SJS) helps prevent gear damage caused by accidental wheel binding.
Improved 12 Amp motor design for increased output power in a more compact tool
Larger and improved carbon brush material for longer tool life
Electronic limiter stops the motor and prevents accidental motor overload and burnout
"Tool-less" wheel guard adjustment for easy clamping
Labyrinth construction seals and protects the motor and bearings from dust and debris by creating a complex set of channels