Package Content: You will receive 200 brooch pins in 2 different sizes. Contains 100 back clasp brooch with 2-hole plate, overall length 25mm/0.98", and 100 back clasp brooch with 3-hole plate, 35mm/1.38" length, both in silver. Durable Material: Our secure brooch are made of high-quality iron, using electroplating technology, with a smooth surface, and the brooches are corrosion-resistant and rust-proof. Secure brooch have sharp tips that can easily pass through most fabrics, are strong and safe, are not easily damaged, and therefore have a long service life. Easy to Use: These silver bar pins are lightweight and have two or three holes on the back, you can easily attach beads or pendants to the back of the pin. The cutouts on the backs bar pins allow you to glue, wire or sew the back using a hot glue gun, needle, glue, etc, depending on your project needs, simple and easy to use. Function: Locking pins with back bar fastener are specially designed for gluing or sewing, they have a locking function on the back, with a buckle that is easy to install and remove, the torque is guaranteed to be in place before the pin can be taken out, no need to worry about it hurting to you, but also keep your fingers away from the needle tip when using it. Wide Range of Applications: You can attach the backs safety clasp pins to most surfaces, as well as glue or sew craft items directly on the holes, they are perfect for handmade accessories that require back safety pins. It's perfect for DIY craft projects, badges, boutonnieres, sewing crafts and more. It's a great choice to wear as decoration on shirts, T-shirts, coats, hats or hang on backpacks.