Brooch Back Bar Pins Safety Rolling Catch 20-38mm Description: Material: Metal Size: 20mm \/ 0.8", 25mm \/ 1.0" , 32mm \/ 1.3", 38mm \/ 1.5" Brooch Bar Width: 5mm Hole Diameter: 2.5mm Color: Silver Features: Brooch back bar pins. Roll over safety catch type. Three holes on the back plate. Use either thick superglue or epoxy resign to attach securely to your brooch. Perfect for jewelry making, making bag charms and other craft needs etc. Package Included: 1 x Safety Rolling Catch