Champ Scorpion Stinger Tri-Lok Spikes (Works with most Fast Twist):

Enjoy improved performance traction with Champ’s enhanced spike technology. These spikes come with an innovative wear indicator so you'll never lose precious traction. The bottom of the spike is equipped with a black “C.” As the spike wears, the “C” will become less and less visible, letting you know when it’s time to replace it. Each package includes 18 soft spikes and a greenskeeper wrench.

Tri-LOK (Fast Twist) — Comes with a one-piece locking ring. The ring keeps dirt and debris out of the shoe’s receptacle, protecting the receptacle and making spike changes easier.