CHICAGO SCREWS – The best choice when it comes to DIY Kydex and Leather Holsters, Knife Sheaths, Belt Clips, or any other piece of tactical gear. Each pack includes 12 Phillips Truss Heads, 12 Open Slotted Post Fasteners, and 12 Rubber Washers/Spacers,EASY TO TIGHTEN – The open slotted fasteners are ideal because they allow for a tighter and more secure connection than non-slotted fasteners,STRONG & DURABLE – Each piece of hardware is made of high carbon steel and coated with a high tech black thermochemical treating to harden it and give it a gun-like matte finish that eliminates any glare. The included washers are resistant to liquids and oils and are able to withstand extreme temperatures.,DIMENSIONS – Phillips Screw Heads have a 3/8” outside diameter and 1/4" long threaded section with an 8-32 thread, Slotted Post Fasteners have a 7/16” outside diameter and 1/4" long threaded section, Rubber Washers have a 1/2" outside diameter