Made of premium alloy 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:Golden -Material:Alloy -Size:1.00X0.70X0.50cm/0.39X0.28X0.20in - These alloy pin backs are awesome! because they keep the pin from moving around. - Pin backs lock pins firmly and secure pins in place, no worry about losing your meaningful pins. - Pin back effectively isolate sharp pins and ensure they remain in place, great replacement for pin clutch backs. - Put the pin in the alloy pin backs, your items will keep pinned securely. They have great grip, and don't loosen with time. - Each pin back has a hole which is compatible with the tie tack pin, it can't fasten if the pin is too slim. Package list: 1 of pin backs( each box 40pcs)