Made of . You can these tools with and you can send them to your friends. With the multi-purpose, they can be used in many ways, very convenient. It can also be a perfect present choice. Rubber pin backs are made of quality rubber, and the empty pin are made of metal. Sturdy and durable, not easy to fade. Features -Color:Black -Material:Rubber -Size:1.00X1.00X0.90cm/0.39X0.39X0.35in - Mini safety pin back clutch. Lightweight and portable design, which is easy to carry and store. - Pin backs lock pin firmly and secure pin in place, no worry about losing your meaningful pins. - Pin back effectively isolate metal pin and ensure they remain in place, great replacement for pin clutch backs. - Put the pin in the rubber pin backing, your items will keep pinned securely. They have great grip, and don't loosen with time. - Replacement for Lost Pin Backs: these pin clutch backs are necessaries for your uniform, clasp badges, name tags, and etc. Package list: blank lapel pin pin backs