Designed for the rolls of patches that we use in Canada. These have been made using a very strong yet impact resistant plastic that is UV stable(no fading in the sun). Using a bolt instead of snapping the lid on will ensure a long life of this product. The main bolt has a stainless steel bolt installed all through the center to ensure that the main bolt remains strong and shear resistant. We've also added an oring to the bolt so that you don't have to strong hand it to remain in place. Screw it down until you feel some resistance and the oring will keep things snug. Feel free to mix it up color wise also, make it your own!! Just let us know what color combinations you would like and we'll put it together for you.