Used leathercraft hardware (tachi-kan? te-kan?). I used this hardware to hang leather smartphone/cell phone cases from my neck by making small holes in the sides. You can attach it by screwing it in, sandwiching the leather, just by making a hole with something pointed like an ice pick (no need for tools like eyelets). The 10-yen coin is for size reference and is not included in the sale. ---------------- Bronze-colored metal leather hardware, perfect for decorating leather products with screws. - Type: Leather hardware - Size: Approximately 10mm - Material: Metal - Color: Bronze - Included: With screws - Application: For decorating and fixing leather products Thank you for viewing.