I ordered this wrench because of it's low price and decent reviews. I just got it today and went to work with it changing the battery on my Seiko. The pins sit very firmly in the wrench and don't fall out. Had the back off, changed the battery, and put the back on in less than 5 minutes. One note, this wrench is made so that the 3 pins will line up on a watch back with 4 slots. My Seiko has six slots on the back so only two pins on this wrench would line up in the slots, but that didn't cause any problem for me, the back opened up just fine using just the two pins.