This set comes with one pair (one left and one right) of hip ratchet replacements for RID Omega Prime or Car Robots God Fire Convoy. These new ratchets now have more "notches" than the original part, which allows the number of ratchet "clicks" on the thighs to increase from 3 clicks to 4 clicks. The clicks are now less spread apart, which allows Omega Prime to have a more natural standing pose with slightly spread-out legs on the first ratchet click, without having to worry about the toy from doing splits and collapsing.
In addition, there is extra friction added betwen the left and right ratchets which will also help with Omega Prime's stability to avoid bending over and collapsing due to the heavy backpack.
CAVEAT: Omega Prime can still do splits on the second click due to it's top-heaviness in nature. However, the first click standing pose will be much more stable than before.
Dissambly and re-assembly of the toy (the crotch and thigh pieces) is required, so be sure that you know how to put everything back together. The spring mechanism can be tricky so take your time. If you cannot fit the replacement part into the thigh pieces, this is because it is inserted incorrectly front/back. Flip the replacement part around, and it should fit.