If you’re looking for something a little stronger and more permanent than the Magnetic Adhesive strips, the LED Metal clips offer the ideal alternative. Within each pack there are 4 metal clips and 4 self-tapping screws, ideal for screwing into a standard melamine terrarium. It is recommended to use one clip per LED strip for standard terrariums; however, if you have large arboreal snakes or lizards, using 2 clips per strip will offer added strength and security.