The T-H Marine Boat Twist Drain Plug offers a simple, reliable way to keep your boat dry. Designed for 1" drain holes, this twist-style plug forms a secure seal with easy tool-free installation and removal. Brass construction resists corrosion Twist design for watertight seal Fits standard 1" drain holes No tools required for use Easy to install and remove Reliable seal against water intrusion Adjustable fit for secure locking Built for harsh marine conditions