The Keyhole Driller(TM) anchor is the perfect hook for picture frames with sawtooth, round of keyhole shapes on their backs. No pre-drilling is required for this product and it can be removed should need be. Installation can be handled using a simple screwdriver and is designed for a maximum load of 20 lb (9 kg). It must be used with 1/2-in drywall. Pack of 6 anchors.