GMC Multi-Function Rotary Tool (135W) - 920154 135W motor, with variable speed 15,000 to 35,000rpm, for versatility and a quality finish in all materials. Spindle lock button allows quick and easy accessory changes. Ergonomic and compact design for easy access in confined areas and greater comfort over long periods of use. 42pce accessory kit to tackle hundreds of applications around the home and workshop.