I bought this to use on the front brake calipers on our MAN axles fitted to New Flyer buses. This allows me to use my 3/4" ratchet on bolts I wouldn't normally be able to reach. It is designed for 2 captive bolts behind the steering arm. It works for that. All factory parts allow you to remove and install brake calipers without pulling on the steering arm. Be aware that the aftermarket calipers are a bit thicker and won't fit between the bolts and the rotor, so I had to loosen the plate/rotor mounting bolts to push the rotor out 1/4. inches for distance. Factory MAN calipers do not have this problem. I've had it for a while and if you always make sure the tool is fully seated on the studs (the factory paint sometimes gets in the way), this tool should last a very long time.