Worked on all my pistols. I did notice that if you need to moved angled dovetail sights like trijicon and the sights are offset compared to the dovetail on the gun, it's better to use the front sight tool that have the tabs sticking out. That way you push on only the area directly above the dovetail and not the overhanging sight itself. It will bind and not push straight. There aren't instructions but if you're able enough to tackle the job of stripping your gun, you can easily figure out this tool. My advise is double check everything before you start pushing. No need to crank down on everything. It's a tool, not a vise. A vise isnt needed either. It seems all of the negative comments about this tool are more of a user issue. It's meant to hold the slide, not "lock it down" like some people think is necessary. Too much force, improper alignment etc. It doesn't take much force to hold the rail, and if the sights aren't moving fairly easy, check you height and alignment. Try to center your pushing directly in line with the guns doveail cutout. Also, some sights are tapered. Find out which direction the sights slide before you just crank down on them, break them, damage your slide, then say the tool is junk. User error seems to be the problem in the comments.