I tried a couple different methods including using a socket just the right diameter and it still tore, after I went thru 2 kits I said screw it and just bought a caliper wasn't going to keep wasting my money. maybe the hole where it fit's into should be honed out a little I don't know that might do the trick.The ones that came with my Powerstop kit had no issues like that. I used a poor man's press (socket) and tapped them in that way. Then you got to watch when you grease the pin and slide it in it wants to balloon open. I use a pick tool to hold it open and let the air escape as I slide the pin in.