The Rumble Strap is made from tubular webbing that’s strong enough to support mountain climbers, but smooth and supple enough for children to hold on tight. Adult riders will appreciate a 9″ rubber handle, built into the webbing and big enough for two hands. Tight climb-spec weave ensures longevity. The Yuba Rumble Strap includes bolts and washers. All you’ll need is an allen key.