Hello: I would like to purchase speed loaders for both my Model 10-5 pencil barrel and my Model 15-4 but I can't seem to get enough info off the web to be sure. HKS seems to be a popular brand. Any feedback/info on what specific models would work would be greatly appreciated. Thanks.

HKS is the only brand I have. It's the #10 for those revolvers.
They work very well for me.
Jim

I also use HKS speed loaders. The older ones are marked 10. The later ones are marked 10-A. The difference is the later ones do not jiggle. I have and use both. The will fit any K frame 6 shot cylinder.

I started out with HKS many years ago and never had a problem with them. The police force I joined in 1994 used Safariland and they were just as good. Personally I prefer the HKS because I have used them far longer than the Safariland.

Ill chime in and recomend the safariland comp 2 speedloaders. No twisting just push and the bullets drop in.

Another vote for HKS. I have them for my Model 10s and 442. Very easy and reliable. I'm looking for some for my Model 18 and 34, especially the Model 18.