I’m buying my first router bits as a new CNC owner, and although I’ve been suggested to look for downcut V-bits, I just don’t see how designing one would be possible without spiral flutes. Yet, I see them advertised as ‘down-shear.’ So what’s up with this? Is calling them downcut just a marketing ploy, or does someone out there actually offer a genuine downcut V-bit? And if so, who?