The Kong Twist-Lock Carabiners feature a twist-lock sleeve and have a 2-movement opening mechanism where the user must rotate the sleeve and then pull the lever to open the gate and are widely used in sports activities like climbing, mountaineering, caving, canyoning, work activities like roof and inclined planes, rope access, arboriculture, scaffolding, and rescue activities like tactical, helirescue, cableway evacuation, mountain rescue, fire brigades, and civil protection. The Kong Twist-Lock Carabiners are certified and conform to health, safety, and environmental protection standards. They are generally made of aluminum alloy, carbon steel, or stainless steel, and are used mainly in applications demanding a higher level of security.