I bought this product a while ago but only tried it today. This is a piece of GHOST! Don't waste time and money. There were no instructions but it was ok. I've used staples before, so I know how to load and use them. However, the loading mechanism was poorly designed and I had to use a screwdriver to pry it open. Again not that big of a problem. But when I used it, it didn't even work! I tried many, many times, but after many trigger pulls, not a single clamp moved. Do yourself a BIG favor and buy a Stanley or DeWalt - I just did! They're about the same price and MUCH better.