The Monkey Hook Original is the best way to hang anything on drywall where there is no stud. Holds 20 lbs. and requires no tools. The Monkey Hook is made from high-carbon (ASTM) spring steel of American origin, coated with zinc to provide a lifetime of protection. Installs securely into place without the need for a studCan be unlocked and reinstalled if neededMade of zinc coated high-carbon (ASTM 227) spring 15 gauge steel with 0.072 inch thickness