Black Chicago Screws, 144 Assorted Pieces Of 1/4 3/8 Inch - For Diy Kydex And 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 144 total pieces - 24 each of 1/4 and 3/8 inch sizes of Phillips Truss Heads, Open Slotted Post Fasteners, and 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 ? 1/4" Phillips Screw Heads have a 3/8? outside diameter and 1/4" long threaded section with an 8-32 thread, 3/8" Phillips Screw Heads have a 3/8? outside diameter and 3/8" 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.