This countersink drill bit set includes 5 tungsten steel Hss M2 tapered bits of various sizes, perfect for woodworking projects and compatible with U.s. standard 82° screws. The low-friction depth stops ensure accurate depth control, preventing work shaking and surface wear. The sharp cutting edges provide smooth, burr-free countersinks, while the hexagonal shank enables quick operation and high efficiency. The compact storage box saves space, and the set is versatile for use with various materials, including wood, plywood, and non-ferrous metals, making it a reliable choice for professionals and Diy enthusiasts alike.