Description: - Vintage Butterfly Clutch Tie Tacks Pin Back Replacement with Blank Pins - Made of high quality durable Brass, great accessories for making brooches - Perfect for matching all kinds of flatback embellishments, resin beads, rhinestones, pearls, crystals, diamantes, and more you like - Just glue the flatbacks on the pin base, leave it for 20 minutes to wait the glue dry in the air, you will get your fantastic brooches - Pin back diameter: Approx. 4.5mm / 0.18inch; Length of pin: Approx. 8mm / 0.31inch; Butterfly clutch: Approx. 11.5x6mm / 0.45x0.24 inch Package Includes: 100 Sets Butterfly Tie Tacks Note: 1. Please allow a slight color difference between the real item and the pictures due to the difference between monitors. 2. Please allow a slight measurement error. Hope for your kind understanding and have a nice shopping day!