FVW Auto Locking Rock Climbing Carabiner Clips,Professional 25KN (5620 lbs) Heavy Duty Caribeaners for Rappelling Swing Rescue & Gym etc, Large D-Shaped CarabinersSolid CarabinerMade from Aircraft Grade Aluminium Alloy (7075), which is light weight and portable, holds up to 5620lbs of weight, more secure and more reliable Auto Locking, One hand Operation With the twistlock design, very easy to use, you can easily operate this carabiners heavy duty with one hand. Turning the screw, you can lock this caribeaner easily, then turn it in the opposite direction and turn it on again to unlock it Heavy Duty and Large