The local Walgreen's has switched over to then ATX and thus they now only carry the HB4 blades. Tue label says it is for all models of headblade. As I needed a blade in bought a pack.
I'll be calling the 800 number for an adjustment. The experience was awful. Felt like I was shoveling rock. Snags all over the head. Certainly not smooth. I've never had a shave so rough in all my months of shaving my head. Knowing Headblade, they will treat me well. I'm sticking with the HB3 blades.
Thanks for saving me the pain and frustration. I was going to try the HB4 with my Sport in the next week or two, but had doubts about the configuration.
an.... did HeadBalde make good?