Omega Tactical Five-O Carabiner Screw-Lok Blem. Five generations of development have perfected this carabiner. Huge gate clearances with deep baskets provide effortless clipping. Available in straight, bent, wire and locking gates for virtually any use. Built from aircraft-quality aluminum and our exclusive ISO Cold Forged process, the Five-O is the premier free-climbing carabiner. Perfect for alpine, ice, and sport climbing, the Five-O boasts up to 32mm of gate clearance.