It is a standard 1/2" teflon coated DU Bushing

but the best never is

Small and ergonomic handle for ease of use

breathable and can be easily carried without taking up too much space

by using an outboard bearing in the freehub it is better able to disperse the increased loads and the steel axle is provided with a pinch bolt to reduce deflection (play) without affecting rolling resistance

FUNN Holeshot Lock On Grips - Olive Green PDP|Option It is a standard 1/2"Developed over 2 years with input from elite athletes, the Funn Holeshot locking grips have been designed to provide grip in all conditions as well as comfort on every trail. The interlocking wave pattern is deep and plush to absorb vibrations and reduce fatigue and the underside of the grip features raised ribs at the fingertips to keep you locked in. Keeping things simple with a single alloy bar clamp and M4 bolt, the Holeshot features a solid shell