These are quite good while used with YR #DF03RA-069. I use them on my Dark Impact DF03. Before assembling in your car, you should dismantle the swing shaft and rinse thoroughly, use locktite on the set screw and if you have a spare set screw, apply another one opposite for the one supplied in the set. Apply new oil and assemble in your car. Some of these set screws tend to loosen during course and the pin slides out.