I am having trouble with stuck bolts and need to know the specific size wrench I should use to avoid stripping the bolt heads. I am specifically addressing the front passenger side caliper bracket mounting bolts. I have sockets but they are too large to reach the bolts and my largest wrench (17mm) is too small. I do not want to use an adjusting wrench for fear of stripping the bolt head. Please if anyone knows the exact wrench size I need to rent/purchase (SAE/Metric).