trailer bearings / tires

[Sean]

MJ, perfect directions, what could go wrong ;D

Well I have these things/caps called, Reliabe Sure Lube. I assume they are the same as bearing buddies, but I cant find much info about them. They have the grease fitting and there site (minimal info) basicly states that I can just purge the greese that in there?? But that goes against what most say regardingthe bearing buddie.
Ever herd of these??
Thanbks!