The Kong Screw Sleeve Carabiners are widely used in rescue activities like tactical, mountain rescue, helirescue, civil protection, fire brigades, cableway evacuation, work activities like sail boats, rope access, arboriculture, elevating platforms, scaffolding, and sports activities like climbing, canyoning, caving, and mountaineering. Instead of the spring-loaded sleeve, these carabiners have a screw sleeve that makes them ideal for use in environments where the spring-loaded sleeve may jam due to dirt. The Kong Screw Sleeve Carabiners are certified and conform to safety protection standards. They are more reliable than the basic spring-loaded carabiners and are ideal for use in scenarios with higher security demand. They are generally made of aluminum alloy, carbon steel, or stainless steel.