Bought Lazer bond USA to fix an antique glass stem that was broken but tried to use it first to repair a gem stone that had come out of a piece of jewelry. Opened the package and most of the glue was inside of it. The package also had an opening where children could press the light lazer so the light barely worked. It said hold the light for 3-9 sec., well the light would not stay on and had to wait for it to charge and keep putting it on the site. It was terrible and took forever plus where do you lay a product down to repair without getting the glue stuck also?! This a terrible product and expensive for what you get. Very unsatisfided customer. Do not buy it is a rip off! I give it a -5 neg. review.