Working Load Limit: 2470 lbs. 4 Pack. Fit: Designed to work with 5/16inch chains or transport binder chain. This fits securely on of a chain and can be hooked over a carabiner for easy attachm ent. Material: Made of Grade 80 Drop Alloy Steel, sturdy construction, not easy to break, and to use. Easy to Use: Designed for easy attachment and release. They help you create a secure attachment with a strong hook pin, and quick release cotter pin. Application: Great for locking heavy cargo and securing large loads in commercial and industrial applications. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:red Material:alloy steel Package Contents: 4 x hook Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.