General description The D1 Speed Adjustable Engraver is a versatile electric grinding pen designed for home DIY projects. It features a compact design, making it easy to handle for various engraving and polishing tasks. Technical specifications Model Number: small grinder Material: Plastic + Metal Measurement allowed error: +/- 1-3 cm Compatibility and accessories Package Contents: 1 x Engraving Pen 1 x USB cable 7 x heads 1 x wrench