Electric Grinder Pen 3 Speed Cordless Rotary Tool For Sanding Drilling Polishing Engraving Diy Projects f74 Feature 13 Speed Settings: The variable speed cordless rotary tool can be adjusted to 3 different speeds at 5000, 10000 or 15000rpm to meet your different needs. 2Multiple Purposes: Whenever you are thinking of engraving, sharpening, grinding, polishing or sanding, you will find this power rotary tool a must have. It is suitable for wood, plastic, tile, glass, stone, metals, etc. 3Long Battery Life: The upgraded lithium ion battery holds 2.5 times more power than previous versions and features fast charging technology to save you from charging anxiety. Convenient micro USB charging ensures charging anywhere, anytime. 4Various Accessories: This power rotary tools comes with 26 accessories and is perfect for a variety of light duty projects. All you need is this handy all in one tool. 5Compact Lightweight: Powerful but small and light, just like holding a pen while in use, for ultimate control and accurate as well as for comfort.Item Type: Electric Grinder PenMaterial: ABSBattery: 1 x 3.6V 18650 650mAh Li ion battery (shipped with built in battery)Rotational Speed: 5000 or 10000 or 15000RPMCharging Interface: Micro USB (DC5V) Package List1 x Electric Grinder Pen26 x Accessories1 x USB Cable1 x Instruction Manual