Dimensions: Blank pins measure 10mm diameter with 9mm length. Butterfly pin clutch backs are 11mm in diameter. Each set comes with 100 blank pins and 100 Silver clutch backs. Durable & High Quality: Pins and clutch backs are made from nickel plated brass. Lightweight, sturdy and locks pins firmly to keep them secure. Handy and convenient replacements for your lost or damaged ones. Practical & Secure: Easy to use butterfly clutches with spring fastener slices provide a good grip on pins to hold them in place. Simply push pin post into clutch backs to secure. Press the twin butterfly triggers to release. Versatile Usage: Great for use with tie tacks or lapel pins that have lost their backings. Use them with badge insignias, citation bars, service bars and name tags. Perfect for jewelry crafting or any DIY crafts involving pins. ASIN B07R6J598R Color 100 Silver Brand Name Millennial Essentials Unit Count 200 Count Item Weight 0.05 kg Manufacturer Millennial Essentials Model Number CL002 Material Type Brass, Rubber, Silver, nickel plated Product Style Versatile Wire Diameter 10 millimeters Number of Items 200 Number of Pieces 100 Manufacturer Part Number CL002