This set of aluminum screw posts by Charles Leonard is a must-have for anyone in need of a sturdy and reliable binding solution. With a variety of sizes, extensions, and male screws included, this set provides approximately 1200 pieces to suit your binding needs. The silver color and 3/16" thread size make them compatible with any project, whether it be for business or personal use. The screw posts are made of durable aluminum and are manufactured in the United States. Order now to streamline your binding process!