Mag Tape Ruler
Magnets on glass?! YES!!!
The MagTape Ruler features a micro-suction surface on the back, which enables it to stick to glass or other flat, smooth surfaces, while the front allows the use of magnets for positioning graphics before the final mounting.
When you're done, the MagTape Ruler comes off just as easily as it went on, leaving zero adhesive residue or any evidence that it was ever there. Yet another part of your job made super simple!