Called contact coins because they lend themselves to a style of manipulation that resembles contact juggling. On the surface, the Deadeyes look like just a refined worry stone made from metal, and they certainly serve well for that.

Precisely crafted and beautifully finished, with an ergonomic indent on either side that is perfect for thumbs of any size. As you’d expect from AO2, there’s more to it than that. The concave shape and resulting ridge around the perimeter make the Deadeyes perfect for contact-style manipulation. 

With practice, these coins can be made to roll fluidly between the fingers, or back and forth over the thumbs, and isolations can be performed where the coins appear to be floating around the fingertips.