Pneumatic Multi Grinder Set Description universal and multi-purpose multifunctional sanding tool contains various tools such as brush belts, sanding discs and foil erasers for different applications for professional removal of rust, stickers, adhesive residues, paints and foils suitable for smooth surfaces on vehicles and other surfaces made of aluminum, metal, glass and plastic powerful grinder reaches up to 4000 rotations per minute ergonomic and cold-insulating handle for fatigue-free working infinitely variable speed regulation via rotary control on the back of the handle 180° adjustable handle free speed: 4000 rpm output shaft: 9 mm recommended hose diameter (internal): 10 mm (3/8") Technical data Length 250 mm Working pressure 6,2 bar Compressed air connection 1/4 " Air consumption 102 l/min Sound pressure level max. 79 dB(A) Sound power level max. 82 dB(A) Vibration 0,8 m/s² Uncertainty K 0,1 m/s² m/s²