This high-quality frame drill bit is designed to make precise and clean pre-installation holes for door and window frames for frame screws. The bit ensures that frame screws can be installed at the correct depth and angle without cracking the material or requiring extra work steps. Made of durable HSS steel, it offers a long service life and consistent drilling results even in harder materials. The bit diameter is 14 mm and the total length is 100 mm, making it ideal for general use in various frame installations. The adjustable 5 mm center drill helps keep drilling accurately aligned and gives the user confidence in every step of the job. This frame drill bit is a reliable choice for both professionals and hobby users when the goal is fast, clean and durable frame installation without compromise.