Features: Discover precisions and efficiency with our Multifunctional Drill Bits, designed to handle various materials with ease and durability. Crafted from premium alloy steel, these drill bits feature a versatile design fit multiple drill devices for seamless operation. Ideal for professional carpenters, construction workers, DIY enthusiasts, and home repair personnel seeking reliable tools. Perfect for drilling through wood, metal, concrete, and more, these bits meet diverse construction needs with exceptional performances. Enhances your toolkit with these robust drill bits, ensuring long lasting use and superior result in every project. Specifications: Material: Alloy Steel Shank Diameter: 3mm: 2.64mm 4mm: 3.37mm 5mm: 4.18mm 6mm: 4.53mm 8mm: 5.49mm 10mm: 7.82mm 12mm: 9.6mm Pattern: 1/2/3/4/5/6/7/8 Package Includes: Package 1: 2pcs Drill Bits(3mm) Package 2: 2pcs Drill Bits(4mm) Package 3: 2pcs Drill Bits(5mm) Package 4: 2pcs Drill Bits(6mm) Package 5: 2pcs Drill Bits(8mm) Package 6: 2pcs Drill Bits(10mm) Package 7: 2pcs Drill Bits(12mm) Package 8: 7pcs Drill Bits(3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm) note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.