This set of drill bits includes eight sizes: 3, 4, 5, 6, 7, 8, 9, and 10mm, providing a range of options for different drilling tasks. The bits are suitable for use in most keyed and keyless drill chucks and are suitable for light duty drilling in masonry and light density brick and block. The set comes in a plastic storage case, keeping the bits organised and ready for use. These drill bits are not TCT (tungsten carbide) tipped, making them suitable for general purpose drilling tasks but not suitable for heavy-duty tasks. Whether you are a professional contractor or a DIY enthusiast, these drill bits are an excellent choice for all your light duty drilling needs. With their high-quality construction and precise design, these bits are sure to provide reliable performance for all your drilling tasks.