1. Shackle material 316 stainless steel, axle material acetyl 2. Low friction and extreme durability, high load sliding bearing 3. Suitable for fiber rope, rope diameter 10mm (without rope) 4. Working load limit 460KGS 5. Control line for cruising and racing 6. Automatic locking universal head can rotate freely as needed 7. Rope or rope for indoor and outdoor applications, very professional and practical 8. Size: 98x52mm 9. Weight: about 79g