1. Applicable grinding head shank diameter: 2.35mm2. Chuck depth: 25mm3. Battery capacity: 300mAh4. Speed: 5000-10000-18000 third gear5. Power: 8W6. Battery voltage: 3.6V7. Charging: 80 can be fully charged in 30 minutes, and can be fully charged in 60 minutes8. Use time: the third gear can run for more than 1 hour with no load. If you need to use it for a long time, you can use it while charging9. Bare metal weight: 45 grams10. Portable engraving pen, small and light, ergonomic design, easy and comfortable to hold in hand11. It can be used for carving, grinding, etching, milling, grinding, drilling, cutting, very suitable for crafting and DIY12. Adopt high-quality copper motor, very quiet, strong power, smooth rotation13. There are 3 gears with adjustable speed (5000 rpm, 10000 rpm, 18000 rpm), suitable for different occasions14. Usually metal/wood speed is low, glass/ceramic speed is fast15. LCD display, keep abreast of the remaining power and gear position, so that you can adjust the speed or charge according to your purpose16. USB charging, long battery life, 300mAh battery capacity17. Built-in safety protection board and intelligent overload protection chip, it will automatically cut off the power supply to prevent the engraving pen from being damagedSpecification: Package Weight One Package Weight 0.30kgs / 0.67lb One Package Size 22cm * 13cm * 4cm / 8.66inch * 5.12inch * 1.57inch Qty per Carton 98 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 98 pcs = 17346 pcs 40HQ: 412 cartons * 98 pcs = 40376 pcs