3-Blade Canal Line propeller is the only propeller specifically designed and manufactured to meet the demands and harsh conditions of the Inland Waterways. The boat propeller incorporates extra thickness at the tips and edges, as well as a high definition anti-singing edge. The Inland Waterways are tough on propellers; collision with submerged objects and debris, in-experienced boaters and poor propeller materials & designs have all combined to create problems for owners and operators. Damage to propellers leads to expensive repair and replacement. The thicker tips and edges are designed to reduce and eliminate this damage.