Usage Tips:Package Includes: 50pcs ID number tags, 50pcs key rings, and a plastic transparent storage box. Including 50 numbers from 1 to 50, which can fully meet your needs.Size: The size of each metal numbered tag is 23x23mm, the diameter of the hole of the number tag of 1-30 is 1.5mm, the size of the matching key ring is 14x14mm, the diameter of the hole of 31-50 is 2.6mm, the size of the matching key ring is 20x1.5mm. The size of the clear plastic box is 125x85x18mm.Stainless Steel Material: Metal number labels tags made of stainless steel are durable, waterproof and easy to clean, suitable for various occasions, and the hollow design is more textured.Suitable for Group Activities: Whether it is a football match, a basketball match, a classroom activity, a birthday dinner or a graduation party, this number ideal tag can be conveniently used as an identity tag to quickly distinguish everyone when playing games or distributing gifts.Widely Used: Metal number tags can be used for keychains, door keys, card bags, suitcases, lockers, storage boxes, cabinets with keys, bicycles, cups with handles, etc., and can be used for distinguishing and sorting in many occasions.