Keyless PinionPins is the innovative new pinning system that allows you to attach materials together and have them stay fast. Simply put the pin through the materials you want to connect. Place the backer on the pin and it will hold in place. With over 10lbs of strength! To remove, simply pull the spring on the backer, and it will easily detach from the pin. This package includes 8 pins and 8 backers. To remove: Step 1: Push backer down on flat top. Step 2: Pull backer up to release!