Standard 1" Caps: Measure 1" in diameter. Expandable to fit standard 2.3-2.5cm flat wrench heads ONLY. Not suitable for car, motorbike or boat ignition keys! Great ID: Separate and organize your similar keys by colors to identify them faster. Extremely time saving for those who tend to mix up different keys. Flexible & Soft: Made of rubbery vinyl that resists tearing and fading. Bendable material allows for easy expansion without cracking or tearing. Easy & Quick to Install: Extremely easy to put on/take off your keys. It can be firmly attached to your key without slipping. Ideal for preventing dirt and collisions. 32 pieces in 8 colors: the set contains 4 key caps respectively for each of the 8 assorted colors. A perfect coding system for marking multiple keys.