This device was defective out of the box. The pins would not insert into the tool, even with the setscrew fully removed. I suspect the cause was due to a burr. However, the overall quality of this item is very suspect. After handling the item, I believe that there is a high probability that unless you have a watch bracelet that is of a VERY SPECIFIC type, something on the tool or bracelet will break or be damaged. After returning the item (Thanks Amazon, you're GREAT!), I took the watch to a local jeweler for sizing. In 5-minutes, and for $5, I was heading home...happy as a clam.