After I put it to the test, I was extremely disappointed with the quality of these industrial and scientific collated fasteners .Although they were advertised as specially crafted for professionals these fasteners did not hold up well under heavy use and often bent or jammed, causing costly delays and frustration on the job site. The only positive aspect of these fasteners was their bright finish, which made them easy to spot in a dark environment. Overall, I would not recommend these collated fasteners for anyone who needs a reliable and durable product for fastening in their work..