The FastenMaster FMLL358B-250 3.63" Ledgerlok Screw is a high-quality steel screw with a hex-head design, making it easy to install and secure with a hex key drive. This pack of 250 screws is ideal for various fastening applications, providing durability and reliability for your projects. The system of measurement in inches ensures accurate installation, and the FastenMaster brand guarantees a trusted and reliable product.