18 Volt Mini Grinder Kit with UL Approved Class 2 Transformer - TJ-79911This 18 Volt Mini Grinder Kit Has Everything You Need To Complete Your Project. Great For Any Time You Need To Work On Smaller Projects Requiring More Precise Tools. This Grinder Has A UL Approved Class 2 Transformer For Electrical Power, And Collet Sizes of 2. 4MM And 3. 2MM* This is a high speed grinder 5000 to 14,000 RPM Set weighs 1 pound, 0. 5 ounces * 18V motor, with a UL approved class 2 transformer for power * Adjustable speed, with many