Features: This grinding machine is designed for shaping crystal nails, polishing nail surfaces, and refining nail edges. Suitable for soft 3D model surfaces. High-speed grinding with 4 adjustable speed settings ranging from 3000 to 20000 RPM. For grinding harder materials, a more powerful machine is recommended. Includes 6 interchangeable sanding heads and sanding accessories. Note: This device may not be ideal for use with very hard materials. Package Includes: 1 x Mini Electric Sander 6 x Sanding Heads 1 x USB Cable Specifications: Item: Mini Model Electric Sander for 3D Printing Material: ABS Speed: 300020000 RPM (adjustable) Power: 100240V 5060Hz Charging: USB Color: Black / White / Blue Size: 16 x 2.4 cm / 6.3 x 0.94 in Note: Please allow 13 cm variation due to manual measurement. Monitor settings may cause color variations between the product image and actual item.