This is a replacement Align Canopy Mounting Bolt Set, and is intended for use with the Align T-Rex 700E, 700E F3C, 600E PRO and 600EFL PRO helicopters.
These are the stock canopy mounts for the T-Rex 600Pro. They will work for their intended purpose. However, there are better options for mounting the canopy. The magnetic mounts from Quick UK make installing and removing the canopy much easier.