Heavy Duty serrated axle washers with deep serrations that grip into a frame.
Force multiplier design increases the force applied by 30%
Smooth Nut face reduces tightening torque friction
Sharp cut teeth 'bite' into any surface to provide maximum grip
4mm thick hardened Cr-Mo steel body
10.2mm clearance hole (fits 3/8" and 10mm axles)
20mm outer diameter grip-face (fits into most dropouts)
Black Oxide finish