Flex LE12-3-100 5-Inch Variable Speed Wet Polisher for Natural Stone and Concrete Variable speed 1200-3700 rpm with soft start GFCI circuit breaker for operator protection Quick-fit water connector for easy connection to 1/2-Inch hose Out-of-the-way water feed system for better tool control Powerful 1150-Watt, 9.3-Amp motor