18mm hardened MAX-Performance steel shackle
PATENTED ANTI-ROTATION FEATURES on the shackle helps fight against twist and cut attacks
Steel sleeve over cross bar for double security
Fits any hydration system using 3/8'' tubing
Allows 70-100% more water flow than other brands
Internal O-Ring seals valve completely to eliminate leakage
Tough polycarbonate material that won't bite close while drinking