These are the newer case-gard ammo boxes. Made of virtually indestructible polypropylene that will not warp, crack, chip, peel, expand or contract, MTM case gard rifle ammunition cases are still the first choice of rifle enthusiasts throughout the world. Mechanical hinge that is guaranteed for 25 years. Snap-Lock latch protects contents from accidental spilling. A textured finish makes it easier to grip and harder to scratch.