All I know is I am glad I do not have to fix these but once in a blue moon.
It is just one of them regal tools made in china. It is red made of steel with no hammer head,just a small curved claw. Just right for compressing that brake. makes it way easy to put that e-clip back on. It fits right down between the spokes of the drive pulley. The claw allows just enough leverage to compress the brake.