Optiparts OptimistTrolley Bow Wow Replacement Kit is a unique system to lock the bow to the Optimist trolley with one quick and simple movement. Prevents the hull from sliding off on steep launch ramps.Trolley Bow Wow replacement kit for the Optimist trolley. Bow Wow is a unique system to lock the bow to the Optimist trolley with one quick and simple movement. Prevents the hull from sliding off on steep launch ramps.The Bow Wow is made of recycled environmental friendly plastic.This kit comes with PVC handles.