Finally zingers that work better and never easily loosen. Our Carbine model does not have the classic pin. It is attached with a clip. The Roto model has a super strong pin and to avoid stress it also rotates. All zingers have durable nylon wires with a safety locking tool clip.Do you need help? Do you have any questions?Ask a question and we'll respond promptly, publishing the most interesting questions and answers for others.