As someone who is always on the lookout for new industrial and scientific fasteners I was hesitant to try these locking coupler pins .However, as my tests showed, they are an excellent addition to any toolkit. The sturdy metal construction ensures that they won`t bend or break under pressure, and the locking mechanism provides added security. The only downside is that they are a bit pricier than other pins on the market. Overall, I highly recommend Favordrory's locking coupler pins for anyone in need of reliable and durable fasteners..