[Stepless Speed]From 5,000 to 18,000 RPM (Revolutions per Minute). Usually, fast speed for glass / ceramic, Low speed for metal / wood. [ 1 x Scriber Pen ]The Scriber Pen is for extra fine, delicate strokes, great for marking on jewelry, or other tiny objects, like rings, pendants, etc. [Comfortable& Easy to Control]Just holds it like holding a pen, & compact design, letting you perform intricate work smoothly and effortlessly. Easily control the engraving/drawing path. Makes smooth and clear strokes. [ and Reliable ]Electric portable drill is suitable for decorate or personalize a wide variety of materials including metal, plastic, glass,Jewelry, ceramic, wood, leather and more;USB-Type-c charge(Suitable for all USB port power),Charge 80% in 30 minutes, charge 100% in 60 minutes,3 gear idling for more than 1 hour., Weight: 0.58642961692 Pounds, Manufacturer: Jaywool