A must-have boat upgrade! The Boat Wise Universal 1-Way Drain Plug features an internal check valve that locks water out of the boat, even if you forget to replace the plug. This patented design even allows for quick draining and easy cleaning. The universal 2- and 3-hole design allows it to replace most common drain plug units on bass and ski boats. Quick and easy installation. This Boat Wise drain plug has been precision-machined and crafted with the highest-quality materials for long-lasting and reliable performance. Patented 1-way check valve Locks water out even if you forget the plug Replaces most drain plug units Fast draining Easy cleaning Quick installation Precision machined High-end materials