Clickster Freewheels : Top quality screw-on Freewheels for the discerning single speed rider that wants super quick pick-up...High strength Cr-Mo body and cog.CNC 3/32" Cr-Mo teeth (can accept 3/32 or 1/8" chains).6 pawls system.72 point pick-up.1.37"x 24T Standard R/H threaded.Body features "EZ-off" 4 dog tool removal slots. Black Oxide finished.