DOUBLE TRI, the new generation of HMS carabiner with 180 ° technology and smooth triple-locking mechanism for maximum safety - push up, turn and open. With the new carabiner series DOUBLE, SKYOLTEC has now an answer for all those who work and climb left-handed or use both hands. With the innovative design (180° spring rotation), the sleeve that closes the gate can rotate in both directions. Conventional Twist/TriLock carabiners can be turned only to the right; therefore, they are more difficult to use for left-handers. Can be used in accordance with mountaineering and industry standard.