Struggling to tighten your tank strap? Bio-tank Lock can fix that! Secure your BCD to the dive tank with just a few quick turns of the oversized knob. Low effort and up to 10x (100 kg) more tightening torque than any convention tan strap buckle. Heavy duty spring automatically adjusts to keep your tank in place and stable throughout dive. Easy to install on any BCD Includes 33in strap to fit any tank No more struggling to secure BCD to tank Just a few quick turns to install and remove from tank Oversized spring knob extends for easy grip Hinged to flip back and out of the way after adjustment Manufactured in Japan