They are a tight fit onto the hub, I used a big hammer on my track car ones, but you would want to reuse them
If it's just to fit bigger rotors, put little cuts into the lip with tin snips and then bend them up so the whole dust shield is flat.
Meh, I've been working around it for 4 years with no troubles or cut fingers. Plenty of others have done it too. Maybe you should watch where you stick your fingers
