Packing quantity: 10 pieces Masonry drill bit set, 4 kind of size: 4 pcs 6mm (0.23in), 2 pcs 8mm (0.31in), 2 pcs 10mm (0.39in), 2 pcs 12mm (0.47in),1 label Material: cemented carbide, biodegradable label paper Color: orange plus silver, brownSize: 6mm: length 100mm/3.93in, tip width 6mm/0.25in, twist depth 60mm/2.5in, bottom width 5mm/0.19in 8mm: length 110mm/4.33in, tip width 8mm/0.31in, twist depth 67mm/2.63in, bottom width 6mm/0.25in 10mm: length 120mm/4.72in, tip width 10mm/0.39in, twist depth 68mm/2.67in, bottom width 8mm/0.31in 12mm: length 122mm/4.80in, tip width 12mm/0.47in, twist depth 70mm/2.75in, bottom width 8mm/0.31inProduct features: 1. The professional-grade carbide tip is designed to quickly penetrate the hardest materials, and the double groove helps to effectively remove waste 2. The three flute will be firmly installed in your drill chuck to ensure zero slip 3. The provided drill bit size is suitable for most wall plug fixing solutionsAttention: 1. Please wear protective glasses before drilling. When drilling hard materials, please use water or oil for lubrication. This will help extend the life of the drill bit and increase the drilling speed. 2. When using a multi-material drill, please do not use it in hammer and impact mode, it is only suitable for rotary mode.