[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 , 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, lightweight & compact design, letting you perform intricate work smoothly and effortlessly. Easily control the engraving/drawing path. Makes smooth and clear strokes. [Durable 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 ),Charge 80% in 30 minutes, charge 100% in 60 minutes,3 idling for more than 1 hour. Colour:silver Material:Metal Package Contents: 11 x flat drill bits, 10 x pointed drill bits, 5 x round drill bits, 4 x jujube-shaped heads 16 x Stencils 8 x flower Stencils 4 x graphic Stencils 4 x letter/number Stencils 1 x writing pen 1 x USB-Type-c data cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.