Halo's Clickster single speed freewheel in a finest top quality screw-on freewheel discerning single speed rider that wants super quick engagement. The body is high strength Cr-Mo & the teeth are CNC Cr-Mo that can accept both 3/32 & 1/8'' chains. The internals consist of a 6 pawl system with 72 point pick up & the thread is a 1.37'' x 24T standard right hand thread. Available in 16, 17 or 18t in Black Oxide only.