It works great while you have it in your hand! Fits in the crack or spine.. of the window to repair the screen. Doesn't cut the screen but does pushes it the groove where it needs to go. However, when you sit it down, much like the famous 10mm socket( or my case torx heads because chevy punished us all when they made the 80 model Camaro and filled them with those screws) it will flee right before your eyes! Lock it up! You'll use it once, lose and have to order another. But hey, at the price it's not bad.