One Drop's Spikes Side Effects in grade 5 titanium.
From One Drop Yo-Yos email dated Monday, May 20, 2024: "When Brian Fellhoelter, who is famous in the EDC (Everyday Carry) world for his TiBolt Pen, Knives, and many other cool things in titanium and other exotic materials, decided to make a yo-yo [forthcoming], he chose to use Side Effects. He asked if he could make his own titanium (grade 5) Side Effects to our specifications for his yo-yo. We loved the idea and he also agreed to build us a small run.
