1.Screw post measurement:the post length is 10mm, diameter is 4mm
2.high quality : made of carbon steel , sturdy and durable, nickel plated, not easy to get rust and erosion
3.Easy to apply: this set of screw posts is easy to install, use a drill to punch a hole of 4 mm diameter, then you can install it
4.Wide application: the screw post is suitable for binder clips,holding and decorating document, book, scrapbooking, photo album, etc., good supplies especially for leather handicrafts
5.Quantity: the package includes 50sets silver 10mm chicago scews.