I have Buffalo Bros... & GripMaker's... both one piece
The Buffalo Bros. are aged with a crack on my old 2nd Gen Colt 60 Army w/ R&D conversion ( suits the worn finish on the 33 year old well use gun )
The Gripmaker (Larry Little ) grip are checkered and have mellowed nicely they are on my Nickel Richard Converson...
good feel and not slippery..
I'd suggest either.....