The Shur-Loc is one of the most recognizable hooks in the rigging world. It is a self-closing hook with a heavy-duty latch that engages as soon as a load is applied to the hook for maximum safety. All models are now equipped with a recessed trigger that is flush with the hook body, which protects the trigger from potential damage. The trigger is also easy to operate with enlarged thumb access--important for cold climates where users might be wearing gloves. Crosby S-4316 Latch Kits are readily available when replacement is needed. Clevis fitting attaches directly to chain, and helps to prevent mismatch between improper chain and hook sizes. Made from Grade 100 alloy steel, featuring Crosby's "Platinum" coloring. Suitable for use with Grade 100 and Grade 80 alloy chain slings. Safety factor of 4:1.