The following additional features have been incorporated in the new Crosby S-320N Eye Hoist Hooks. (Sizes 3/4 metric ton Carbon through 22 metric ton Alloy.) • Metric Rated at 5:1 Design Factor for (Carbon Steel); 4:1 Design Factor for (Alloy Steel). • Can be proof tested to 2-1/2 times the working Load Limit. • Low profile hook tip. • New integrated latch (S-4320) meets the World class standard for lifting. • Heavy duty stamped latch interlocks with the hook tip. • High cycle, long life spring. • When secured with proper cotter pin through the hole in the tip of hook, meets the intent of OSHA Rule 1926.550(g) for personnel hoisting. • Fatigue rated at 1-1/2 times the Working Load Limit at 20,000 cycles.