Diamondback custom bullets

Has anyone ever heard of Diamondback custom bullets? They only produce .44 and .45 caliber projectiles, but they show some interesting bullet styles and shapes:


Does anyone know what the intended purpose of the *heavy serrated" on the right of the photo is?

It’s certainly different looking.

Maybe like a Pingrabber sort of projectile? He shows a few other interesting bullets like the “Viper point” on his website.