Features BRASS COLLET: The electric engraving pen adopts precise brass collet, with high concentricity and stable clamping, can be used for grinding heads with a shank diameter of 2.35. STAINLESS STEEL BODY: The main body of this electric engraving pen is made of stainless steel, which is resistant to wear, rust and corrosion, ensuring service life. COMFORTABLE TO USE: This electric engraver is not only delicate and beautiful in appearance, but also offering a pen like comfortable using experience. SPEED REGULATION: The rotation speed of this engraving pen is 5000 to 25000RPM adjustable, can meet your various needs. WIDE USAGE: This electric rotary tool can work accurately and comfortably on almost any surface, including glass, metal, wood, plastic, leather, jewelry, etc. Spec: Item Type: Electric Engraving Tool Material: Stainless Steel, Brass Model: XYF DM301 Speed: 5000 to 25000RPM Per Minute Maximum Power: 25W Power Supply: USB Charging Voltage: 3.7V Battery Capacity: 3.7V Lithium Battery x 1 (280mAh) (Built in) How to Use: Take out the product and operate according to the user manual. packing list: 1 x Electric Engraving Tool 1 x Charging Cable 2 x Engraving Needle 1 x Wrench 1 x Accessory 1 x User Manual Package List 1 x Electric Engraving Tool 1 x Charging Cable 2 x Engraving Needle 1 x Wrench 1 x Accessory 1 x User Manual