Made of plastic, resin material. 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. Features -Color:Assorted Color -Material:Plastic, resin -Size(back):1.60X1.40X0.30cm/0.63X0.55X0.12in -Size(needle back):1.00X0.90X0.90cm/0.39X0.35X0.35in - Great for use as lapel pin backs, brooch pin backs, tie pin backs hat pin backs, fits on tie tacks, badge pin, name tag, etc. - Compact shaped handle on the pin back is designed for easy grasp, bring you convenience. - With smooth opening and closing, the replacement pin back is well secured, safe to use. - Also can used for jewelry making and DIY craft projects, very professional to use for diy. - Mini safety pin back clutch. Lightweight and portable design, which is easy to carry and store. Package list: 1 of Pin Backs