EBayUnique Design: Accurately hang saw-tooth or wire picture frames with zero measurings. A unique positioning system accurately marks your nail holes so you hang accurately and perfectly marked on the wall where the nails need to be placed. Hanging: This marker (button) system can be accurately and perfectly marked on the wall where the nails need to be placed. Easy Operated: It's easy to use, saves time, walls & frustration, hanging a picture for perfect placement in seconds. Extendable: Press the middle movable button, you can hang a long picture. WORKS WITH SAWTOOTH & D-HOOK HANGERS Insert Magnekeys - Remove the MagneKeys and insert them into sawtooth, Precision Hanger, or D-Hook. Level & Mark Holes - Place a removable level on the top edge of the frame. Position and level frame on the wall then push to mark your nail holes. Install Hardware / Hang Picture - Locate the marks on the wall made by MagneKeys. Install nails straight into the wall marks and easily hang your picture! WORKS WITH WIRE HANGERS Extend & Hook - Press center button to extend Picture Hanging Tool. Suspend the frame wire on the built-in hooks, then position and level picture. Mark Hole(s) - Pressing firmly against the wall, remove your frame. Locate the removable Push Pin (under the level) and mark your nail holes through the hooks. Install Hardware / Hang Picture - Locate the mark(s) on the wall made by the Push Pin. Install picture hook hardware and easily hang your picture!