Senco DuraSpin Screws Pain-Free Productivity DuraSpin collated screws make even the novice or apprentice user as fast as the most experienced bulk screw user. Plus, collated screws mean no more screw slivers underneath your fingernails, or painful finger cuts from bulk screws. Reduced waste Eliminate the waste experienced with bulk screws (can be 10% to 15% of total screws used) Patented SENCO DuraSpin feed system drives screws quickly and efficiently without jams or misfeeds. Senco DuraSpin screws are collated 50 screws per strip. Senco DuraSpin Screws Also Fit: Makita, Milwaukee, Grabber, Hilti and PAM Collated Screw Drivers.