DescriptionFeatures:Everything you need to cut, carve, clean, grind, sand, and polish a variety of projects.Designed to work with any electrical rotary tool that accepts a 2.3MM or 3.0MM universal shank.A general purpose assortment for cutting/carving, cleaning/polishing, grinding/sharpening and sandingSpecifications:Input Voltage: 100-240V 0.4A 50/60HzOutput Voltage: DC18VSpeed: 18,000 RPM max.AdjustablePackage Included:1 set Micro Drill Grinders