They look and feel good but I wouldn't recommend 1" unless you are willing to use existing size 1-1 studs to grind off. /2". I really should have known better and might have used them anyway, but the company should report it. Also, the eyelets provided to attach the spacer to the axle are too thick. They don't sit flush with the surface of the spacer and therefore need extra sanding, so if you really don't need them, it's a lot of work.