Mini cordless rotary tool, USB rechargeable grinding pen set for electronic repair, cutting, engraving, drilling, polishing, 5 adjustable speeds

Specifications: Item Type: Mini Cordless Rotary Tool Product Material: Aluminum Alloy Power Supply: 1 x 1000mAh Lithium-ion Battery (Built-in) How to Use: 1. Long press the power button to turn the product on and long press the power button to turn it off. 2. Adjust the speed by pressing the + and - buttons when the product is on. Package List: 1 x Grinding Pen 7 x Grinding Heads Note: There may be a slight error in size.