Technical Parameter Product type singlehead jewelry pneumatic engraving machine power 25 W adjustable speed: 1400 RPM, air pressure: 0-3 kg/cm2;. Precise & Adjustable Gauge The pneumatic graver is equipped with a pressure regulator and gauge You can select the appropriate pressure as you need and read the pressure on the gauge in time to ensure a better engraving effect Portable Design The pneumatic hand engraving machine is made of rustproof steel material with a painted surface It is easy to move and work in different places with a compact and lightweight design Reasonable Layout The pneumatic jewelry engraver machine adopts a userfriendly design and reasonable layout easy to operate intuitive, and clear. The foot pedal is convenient for precise control. Various Application: The pneumatic impact engraving machines are suitable for jewelry, crafts, wrought iron, and other industries. It can be regarded as a good helper for engravers.