Oh they broke, lol. I had to use the star bit on a screw driver extension and a pair of vice grips to get the bolt loose. Then had to ultimately remove the caliper and rotor, then after breaking off the back side of the sensor I was able to punch the rest out the front. What I anticipated being a 30 min job, became an hour and 30 minutes but the wife took it in pretty good stride.how hard were they to get out up front? I had to take my rears out to move them to the new brackets and I thought they would break before they came out.