This countersink drill bit set features 3 durable tungsten steel Hss M2 tapered bits, designed for precise, burr-free countersinks. The low-friction depth stops provide accurate depth control, while the hexagonal shank ensures quick, efficient operations. With sizes compatible with U.s. standard 82° screws, the set is versatile for woodworking and a variety of materials, including wood, plywood, Mdf, and non-ferrous metals. The compact storage box makes it easy to store and carry, while the sharp cutting edges enable high drilling efficiency. This set is perfect for DIYers and professionals looking for reliable, space-saving tools.