Features: What you Get:The Clutch Pin Backs set contains 3 style pin back in different color, pin keeper lock, PVC Pin black, for butterfly pin tack. 10pcs round PVC black pin back,10pcs round PVC red pin back,10 pcs round PVC yellow pin back,10pcs nickel pin keeper lock,10pcs gold pin keeper lock,10pcs gold for butterfly pin tack,10pcs nickel for butterfly pin tack,30pcs gold pin,30pcs 8mm gold lapel pin,30pcs 8mmnickel lapel pin,30pcs 10mm nickel tack pin,totally 150 pcs. Quality Material:metal pin back and tack pin are made of quality nickel plated brass, sturdy and light. Anti-wear, lock pins firmly and keep them. The rubber pin back are made of high-quality PVC. Each pin back has a hole which is for the tie tack pin well. Convenient to Use:Easy to install and remove for its flexible spring fastener slices. Not need to special tools. They can clasp tightly and the pin will not spin around loose. Multiple Purpose:Work great in any jewelry making. Perfect replacement for uniform, jackets, hat, tie tacks, bags, name tag, toy pins, cufflink pins, scarf pins, brooch pins, service bar, waist decoration and other DIY crafts. Proper Package:All of them are packed into a plastic grids for case, avoiding mix together. Convenient to carry and store. Specifications: Material: Copper + Rubber Cap Buckle: Approx.11mm/ 4.33inch Cap Nail: Approx.8mm/ 3.14inch Package Includes: 150Pieces/Box Pin note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.