Description: Material: Made of high quality zinc alloy, durable and lightweight, Metal keychains not easy to break . Widely Application: metal keychain can be used as a fashion pendant for purses, bags, mini bags, handy bags, keychains and backpacks etc . Vernier Caliper and Ruler: Miniature available tools are a fully functional caliper, can measuring range 0-40mm, 0-5cm ruler, and are very well made . Easy to Use: Movable Precision Vernier Caliper, can hang multiple keys such as car keys, house keys, work keys, etc . Great gift: compact and lightweight design makes it easy to carry anywhere, and gift for parents, friends, or loved ones on Christmas, Holiday, Easter, Birthday, or everyday life . Specification: Material: Zinc Alloy Color: Silver, Bronze Vernier Caliper: 10.7cm/4.21inch, Dia 3cm/1.18inch Ruler: 11.2cm/4.41inch, Dia 2.9cm/1.14inch Package Includes: 12 Pieces Keychains Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!