Housweety 100 Sets Tie Tacks Blank Pins with Clutch Back (Silver Plated) Material:Copper(Lead and nickel free) Size: Approx:11.5x6mm 8x1.2mm Hole size:1.2mm Package includes: 100 blank pins with clutch back Quantity:100Sets Apply to tie tacks, badge insignia, citation bars, service bars and jewelry making