I bought one, ended up slicing my thumb and breaking the actual pusher removing a Shield front sight. Sent it back and got a generic "universal sight pusher" that actually has milled aluminum parts and I calmp it into my bench vice. It's been excellent and I've used it on several different pistols. "
Maybe you have a different one than I have, the one I bought has all steel parts with aluminum frame and different sizes of plastic inserts to protect the gun finish. I used it to replace the sight on my Glock 26 and it worked great. Haven't tried in on any front sights yet.