Mini rotary engraving pen kit / mini grinder. Rated input power 280 W, variable speed from about 5,000 to 25,000 rpm, rated voltage 220 V. Overall dimensions roughly 9.84 in × 2.17 in, disc-bore diameter 14 mm (0.55 in) and weight about 3.31 lb. Surface-mount style accessories and electric power source; model KSDM by HILDA. The kit is customizable and intended for home DIY grinding and engraving tasks.