For writing and engraving on hardened steel, metal, glass, plastic, ceramic and stone Simple needle change For chiselling, fossils work Technical feature Value Valve Rotary vale Frequency 540 Hz Vibration < 2.5 m/s2 Noise......For writing and engraving on hardened steel, metal, glass, plastic, ceramic and stone Simple needle change For chiselling, fossils work Technical feature Value Valve Rotary vale Frequency 540 Hz Vibration < 2.5 m/s2 Noise level 65 db(A) Air consumption 0.9 ls Weight without hose 0.15 kg Diameter 17.00 mm Length 162.0 mm Hose unit inclusive Air supply hose 2.5 m Connection thread Plug-in nipple Accessories supplied needle set