Introducing the COMOWARE 246Pcs Drill Bit Set Combo, your ultimate solution for a wide range of drilling and driving tasks. This set combines a 100Pcs Drill Bit Set with 146Pcs additional drill bits and screwdriver bits, providing you with a comprehensive collection for wood, metal, and masonry drilling. The 100Pcs Drill Bit Set includes 26 HSS drill bits, 13 masonry drill bits, 13 brad point drill bits, 32 1'' screwdriver bits, and 16 2'' screwdriver bits. All pieces are housed in a durable case with sponge cushioning to protect the bits during transportation and storage. The brad point bits are ideal for clean, accurate holes in wood and plastic. The HSS drill bits are perfect for metal, while the masonry bits are designed for stone, concrete, and brick. This versatile set is suitable for electric screwdrivers, hand screwdrivers, electric drills, and air drills, making it an essential addition to any toolbox. Whether you're a DIY enthusiast or a professional contractor, this drill bit set combo is the perfect choice for all your drilling and driving needs.