The Air Engraving Pen is used to write on hard steel, metal, glass, stones, ceramic, plastic etc. also useful for debugging, to reshape the cut on the screw-head or broken bolts to ease removal , and naturally,to personalize tools and other equipment in the workshop. ⚙️ Specification Vibration frequency 11,400 RPM Avg. Air Cons. 2 CFM (56.6 l/min) Air Pressure 90 PSI (6.2 bar) Net Weight 0.19 Kgs (0.42 lbs) Overall Length 169 mm Tool Diameter 16 mm Air Inlet 1/4″ Air Hose I.D. 1/4″ (6.5 mm) Packing 30pcs/ctn/1.6cu-ft/GW:11kg
