InterDesign Power Lock Suction Hooks, Combo of 4, Clear Single hook design. Suction cups need to be placed on a smooth, clean, dry surface, supposed to moisten the suction cup before applying. Securely affixes to smooth surfaces Simply lift, push and lock Made from durable clear plastic Includes two 2" x 2.5" hooks, one 2.2" x 3" hook, and one 2.75" x 3.5" hook