The keychain is constructed from a fully cast metal, typically a die-cast zinc alloy known for its durability and ability to hold fine detail. The 'team color' finish is often applied via plating, such as nickel or chrome, or as an enamel coating. While resistant to minor scuffs, prolonged contact with abrasive surfaces, like keys rubbing against concrete or rough fabric pockets, can lead to gradual wear. Plating thickness, often between 5-10 microns, significantly influences this resistance. For optimal longevity, keeping it separate from sharp or heavily textured items helps preserve the surface integrity, which is generally superior to painted plastic alternatives that may chip more easily.

The standard split ring, typically made from hardened steel wire with a gauge around 1.5mm to 2mm, is designed for everyday keychain use. It provides a secure hold for multiple keys and attachments, with a tensile strength estimated to withstand over 50 Newtons of force before significant deformation. While solid, the spring tension can be overcome with significant prying force, potentially causing permanent deformation. For typical loads, such as keys in a pocket or bag, it offers reliable security, far exceeding the weight of the keychain itself, and is less prone to accidental opening than simpler hook mechanisms.

The 'exceptional fine detail' is a direct benefit of the die-cast metal manufacturing process. This technique allows for intricate sculpting and high-resolution relief, capturing nuanced logos and text far more precisely than methods like simple stamping or printed graphics. This results in a tactile, three-dimensional representation of team insignia, often with depths of 1-2mm in recessed areas, providing a premium look and feel that endures longer than surface treatments which can wear off.