The metal pin backs, enough for replacement to your torn or lost backs badges, name tags, etc., also good for making DIY crafts, wedding flower lapel pins. No tools required, clutch with spring fastener allow you to install and remove it easily, handy and convenient for use. Features - Color: Silver. - Material: Alloy. - Size: 1.1 x 0.8 x 0.5 cm. - Easy to use, no tools required: allows you to install and remove it easily, handy and convenient for use. - Clutch backs and blank are made of copper, sturdy and light, lock keep tie in place securely and firmly. - The 100 sets of tie tacks, enough for replacement to your torn or lost backs badges, name tags, etc., also good supplies for making DIY crafts. - These blank and clutch back can be applied to tie tacks, lapel pins, badges, service bars, and jewelry making, etc. - It can be applied to lapel pins, tie tacks, service bars, jewelry making, etc. Good replacement for lost backs badges, name tags, etc.