I've got those grips on the sp101. My understanding is that there's two versions of this same grip. The one that I have is typical soft semi tacky rubber. The other which bears the same, or similar identification numbers, is made from some kind of hard polymer. I got mine from a popular website, let's call it glamazon, and there was many problems, and long faces, because of the misunderstanding. So be aware of that. It's said that the rubber version can leave the concealed carry user with printing on a shirt, or similar. I don't carry, so I can't comment on this issue. Only that some people were receiving the wrong one, when clearly ordering the hard plastic from the description.
As far as fitment; I've had no issues, and the grip fits my hand perfectly. The factory grip is hard to hang onto, as it's small, and provides no purchase for the little finger. The diamond pro helps with both. It's not a fat grip, width wise, but fills the hand comfortably as well as the area between the trigger guard and the grip very well, but not completely. There's room for improvement. But it's worth the twelve to fifteen bucks to transition you away from those terrible factory grips. At least until you find something better. It's true that you get what you pay for. Mine is for a cheap car gun, so I'm really happy, but if it we're something for an expensive shooter, I'd spend a bit more. BTW, there's nowhere to put the factory provided takedown pin, if you're hoping for that. It made my sp101 a pleasure to shoot, compared to what it was... a world of difference.
