Core Concept Yoyos - DiesisDiesis is a hollow-body, flat sided full metal yo-yo.There aren't many yo-yos like this these days! The Diesis is not just a rare design, but the way in which it was constructed is also different from the flat sided yo-yos that came before it. Rather than a flat cap affixed to the sides, the flat side is incorporated into the body shape itself, and the seam between the two parts is formed where the profile steps from straight to round. The simple appearance belies a much more complicated design and construction!Despite its dimensions, the Diesis's stability relies on the weight distribution that focuses its mass as far out as possible. Thanks to its unique design, the Diesis achieves a smooth playfeel that you wouldn't expect. This isn't just a normal full metal yo-yo; Core Concept has shown that they're willing to play with both our expectations and very ideas behind how yo-yos are made.