They were easy to install. Great instructions. I got these to improve darting and it works even better than expected. They almost completely eliminated darting.

to be honest haven't been out yet to try but revco them selves are great to deal with answer email deliver on most stuff good most stuff id good price but some is crazy wish they carried more product I would buy more use to deal with sled pro which were number one until they retired now revco with some more product is great