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Keep your tools secure and eliminate potential hazards with Proto's T-shaped tether-ready hex keys. These durable keys feature a collar that allows for easy attachment of a tether to the user or fixed object, preventing drops that can cause injury or damage. With a long arm length of 5 3/8 inches and a short arm length of 1 inch, these hex keys provide exceptional torque and ease of use. The black oxide finish ensures durability and resistance to wear and tear. Applications include automotive, aviation maintenance, and manufacturing, making them ideal for a range of industries. Trust Proto's T-shaped tether-ready hex keys for reliable and secure fastening at height.