i think those are the grips it came with,if you want to go to wood grips,look for smith j-frame round butt grips,or after market j-frame grips,there are many.
As for rubber grips and for all-around shooting, carrying, concealing, durability... they're my fav to.These are the UM Boot grips suppled by S&W. They were a licensed rubber version of the Craig Spiegel Boot grip and are my personal favorite for shooting a RB J frame.