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.