What I like is that they are adjusted on the pushrod cup at the end of the rocker instead of that big high poly-lock sticking up thru the middle of the rocker on the end of the stud. Also, the pedestal design looks even more rigid that a stud, though I'm not using very high pressures (155/377). It seems they will fir under my stock valve covers, and they are a LOT cheaper than the true shaft rockers by Jesel, Crower, T&D etc.