These plate hooks are designed specifically for the lifting of steel plate, but can also be used on stacks of metal or timber. To maintain load stability, be sure to use them only with three or four leg slings. Also be sure to keep an eye on lifting angles so that your hooks maintain a proper bite. Because they feature a closed eye, you can attach these hooks to an existing sling using hooks or shackles (we can also build you a sling with these hooks on bottom, connected with coupling links). Made from Grade 100 alloy steel, safety factor of 4:1.