Hello; If the gun is AIR operated, adjust the AIR presure DOWN on the regulator on the air compressor tank? If it is electric operated! there should be a depth DIAL (say 1-8, 1 being the least depth and 8 being the most; depending on the hardnest of the item being stapled) trial & error to be tried on a scrap piece first......! hope this helps, John.
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Hello; If the gun is AIR operated, adjust the AIR presure DOWN on the regulator on the air compressor tank? If it is electric operated! there should be a depth DIAL (say 1-8, 1 being the least depth and 8 being the most; depending on the hardnest of the item being stapled) trial & error to be tried on a scrap piece first......! hope this helps, John.