The metal engraving tool kit includes 30 polishing bits, 2 drill bits, 3 saw blades, and 4 stencils. Ideal for beginners, this kit supports engraving, carving, sanding, polishing, routing, grinding, drilling, and cutting tasks. This metal engraving tool features a powerful motor with a rotation speed of up to 20,000 RPM. It offers 3 adjustable speed settings ranging from 5,000 to 20,000 RPM, suitable for various applications. Lower speeds are safe for delicate tasks, while higher speeds effectively handle metal carving. The engraver is equipped with a lithium-ion battery and can be recharged via USB. Cordless operation provides up to 30 minutes of runtime on a full charge and can be powered by any device with a USB port. Compact and portable, this engraving machine is easy to carry and perfect for jewelry making, crafts, and detailed handwork. The engraving pen works on materials such as metal, glass, ceramic, leather, wood, jewelry, stone, and statues. Simple to operate, it allows users to create custom keychains, necklaces, and other personalized items. Makes a great gift for occasions like Christmas, New Year, birthdays, and Father's Day. Upgrade your creative projects with this versatile engraving pen. **Specifications:** - Size: 16 x 124mm - Power source: USB rechargeable - Speed range: 5,00020,000 RPM - Rated voltage: 3.7V - Bit diameter: 2.35mm - Runtime: Up to 30 minutes (fully charged) - Material: Metal - Color: As shown **Package Contents:** - 1 x Engraving pen - 1 x USB charging cable - 2 x Drill bits - 3 x Saw blades - 30 x Grinding/polishing bits - 4 x Stencils Note: Light reflection and screen differences may cause slight color variations. Measurement error allowed is +/- 13 cm.