I bought to try to lubricate/replace the springs in some cheap switches. I took the Blues Outemu Magicforce 68 but they were too wide. I've taken apart a few of my other switches with no problems, so I know the puller itself isn't warped or anything. As other people have said, most of the switches are pretty tight and I was a little concerned about scratching something, but I haven't had any physical damage yet. Just check the dimensions of your switch before you buy it and make sure it's about the same size as Cherry's (with very small variations).