Yes, I have the hot fix gun for the crystals. It is a lot of fun, and adds sparkle where you want it. The crystals I bought came in different sizes. Crystals are measured in mm(millimeters). You can get them as tiny as 2mm or as large as 8 and 10mm, maybe even larger too. I bought the hot fix gun at Hobby Lobby with the crystals. The gun has different size tips that you put on for the different size crystal you are using. Have fun and be creative.