These clips allow you to mount and secure a glass build plate cut to fit the standard dimensions of the stock build plate of the Flashforge Creator Pro and it's common clones. Just make 2 (one each for opposite corners and secure using the corner screws holding the metal build plate to the HBP (i use wingnuts, but your mileage may vary), and your glass will remain secure from sliding around, allow for quick and tool-less removal and replacement of build plates (for swaping out between glass+hairspray, painter's tape covered glass and kapton tape covered glass for printing different types of filament. A few things... 1: This assumes that all your glass plates are exactly the same size, and roughly the correct size of the build-plate, but slightly larger, NEVER smaller. 2: Fit the first corner snugly to the corner of the metal plate and tighten it down. Put the opposite corner in place, but don't tighten it down. Put your glass in place, and then adjust the opposite corner so that the glass fits snugly, and then tighten down the final corner's screw. 3: You will now be able to pop the build plate off with a fingernail, grab another glass build plate, pop it in place and start another print in a matter of seconds. Vibration will case the wingnuts to loosen eventually unless you put a washer under the corner and a lockwasher after that. Still good to check them when you swap out build plates by making sure that the plate does not move. If it does, just re-tighten the screws. Now, some might think that the HBP would cause these to melt down and warp quickly, but previous versions (that where not as thick) lasted for 30-40 hours of printing before being replaced, and where still working fine when I replaced them with this new version (but the washers had sunk into and bonded with them by this point... but shrug... that's fine). This is the most recent version and so far is working great! I'll update if I make any modifications, but I don't think it will be needed.