The GYSPRESS 8T 'PUSH PULL' Self Piercing Rivet Gun is the latest advancement in aluminum SPR riveting for collision repair on aluminum and steel vehicles. The machine features a closed hydraulic system that never needs maintenance or hydraulic oil. The machine is self contained so no external pump is needed, just attach your air supply and you're good to go with the smoothest operating SPR Gun available. All controls for speed and pressure are right at the technicians fingertips making the GYSPRESS 8T PUSH PULL Featured rivet gun the top choice in a SPR Tool. If there are any questions please call 305-793-9503 Giulio Valle Pro Line Systems International Inc.