From the maker:
A 3mm Purple Heart line is embedded only into the spike of the 167mm Ken. The lengthened shape makes catching flips, juggles, and gunslingers prime, while the extra added weight enhances lunar balance.
61mm Tama.The coarse, raw finish and 22mm bevel makes for a grip that bites.
Tama and Ken weights are matched to a production standard, making for smooth, fluid, and balanced spacewalks.