●HIGH QUALITY MATERIALS: Made of brass material, these acorn nuts are sturdy and . ●FASTENER: Brass cap acorn nut is a type of fastener which gets its name from its shape. it is a nut that has a domed top to prevent contact with the external thread. ●SATISFACTION GUARANTEE: We care for every customers feeling.if this product does not meet or exceed your expectations,please send it back for a 100% refund no questions asked. ●SCOPE OF APPLICATION: They can be used as high strength fasteners for machinery, furniture, vehicles, etc.and ther are mainly used on cars, tricycles, electric vehicles to fix tires and axles. ●EASY TO USE: This domed top nut makes them easy to tighten by hand, as well as adding a decorative finish.