Tired of measuring and the time it takes to locate a security hardware T-screw on a wall? T-Screw Companion can help. Quickly & easily mark sheetrock or wood to determine exactly where the T-screw should be installed. No measurements & no guesswork. The patent pending tool is a robust design made completely of metal. It can be mounted to the slotted T-screw bracket while the artwork is hanging and self-centers in the slotted bracket. When the frame is pushed at the location of the tool, the exact T-screw location on the surface is marked with a divot (pointed depression).