MANTALOCK™ is a mechanical plugging device used in underwater applications for blocking holes. This innovative underwater mechanical borehole plug is the first of its kind to utilise a single tether. The MANTALOCK™ features a specifically tailored design to support explosives in decking or presplitting applications. The product is ideal for underwater applications and any weight can be tied onto the MANTALOCK™ allowing for any depth of water to be pluggable. MANTALOCK™ is simple to install with a fibreglass rod ensuring the product is held tightly in place. MANTALOCK™ is designed to wedge itself in place with flexible wings to help seal the hole and prevent explosives runoff.