✔【Versatile Engraving Tool】The pneumatic engraving machine is a highly adaptable and efficient tool designed to engrave a wide range of materials. From gold and silver jewelry to copper jewelry this machine delivers accurate and professional results. ✔【Adjustable Speed & Tension】With adjustable speed ranging from 400 to 8000 RPM and a tension range of 0-4 kg this pneumatic manual engraving machine offers unmatched control and accuracy. ✔【Double-head Design High Efficiency】Featuring a double-ended design our engraving machine allows you to switch between different engraving tools quickly and effortlessly. This not only saves time but also allows for smooth transitions between different engraving techniques. ✔【Compact Design】Measuring 210 x 130 x 290mm and weighing about 9kg this double-head pneumatic engraving machine is compact and easy to handle. Its sturdy construction ensures durability making it ideal for both professional jewelers and hobbyists. ✔【Easy To Use】Humanized control panel design reasonable layout simple operation intuitive and clear. People no longer worry about complicated design and cumbersome operation it is very convenient and easy to use. Foot pedals facilitate precise control.