Brooch Back Bar Pins Safety Rolling Catch 20-38mm Description:Material: MetalSize: 20mm \/ 0.8"、 25mm \/ 1.0" 、 32mm \/ 1.3"、 38mm \/ 1.5"Brooch Bar Width: 5mmHole Diameter: 2.5mmColor: SilverFeatures: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