Material: Keychain is made of high quality surgical steel with a shatterproof liquid glass coatingProduct Dimensions:➜ Swivel Attachment Keychain➜ Key Ring Diameter: 1.1” (28mm)➜ Dog Tag Pendant: 1.1” x 2" (29mm x 51mm)Perfect Gift:If the custom engraving option is available, engrave onto the back of the pendant your loved one's name, your wedding date, an anniversary, or anything else you want to remember and keep you close to their heart. Each personalized piece offers exceptional craftsmanship that is fit to be an instant classic in your family.