More than meets the eye, these pillars are specially designed for maximum use of surface area, not just on paper, but in practice.
Many 'enhanced' surfaces simply clog, while these are designed to function with a combination of expanded area, expansion area, and capillary function.
Plus they look super cool when they spin.
I've had a couple months using both the 20 and 30mm versions of this on multiple bangers. In addition to benefits you get from using any pillar, hollow pillars let you accurately dose your dab by filling it 1/4 full 1/2 full, what ever size you become familiar with. Hollow pillars pretty much double the surface area and this specific etching and pattern seems to really attract the oil. As the pillar rolls, it smashes the oil between the hot pillar and the inner wall of the banger. That's when your oil output really starts kicking into high gear. I was worried it might be hard to clean or easy to burn, but so far it hasn't been a problem.
