Framer Supply's Hardened Metal Wrench is the right tool for the job when it comes to properly using Locking T-Screws. Hardened security wrench can reach behind your artwork and frames, up to 2 inches. Use to install (lock) and uninstall (unlock) your work from the wall. Simply slide wrench behind frame to find screw. Once placed gently turn to change the screw orientation. The hardened metal of the wrench will not bend or slip from the screw making changing your art quick and easy.