Features: Crafted from steel alloy, with a hardness of up to HRA 90+, the wear resistance is doubled compared to ordinary drill bits, making it suitable for drilling hard materials such as concrete and bricks. The hexagonal handle structure ensures a more secure clamping force, improving grip stability by 30% compared to a round handle, making it convenient for fine drilling in narrow spaces and suitable for professional construction personnel. We offer a variety of diameter options ranging from 5mm to 12mm to meet different apertures requirements, adapt to diverse engineering projects, and solve various drilling problems for users in the fields of construction, decoration, etc. Lightweight and easy to operate, not prone to fatigue, especially suitable for long-term use, suitable for home DIY enthusiasts and professional technicians to quickly complete various drilling tasks. The drill design ensures precise drilling with error of less than ± 0.2mm, suitable for fine operations of high-density materials such as concrete and stone, improving overall construction efficiency and meeting the requirements of the modern construction industry. Specifications: Material: Steel Alloy A variety of diameters are available (5mm, 6mm, 8mm, 10mm, 12mm) Quantity:4,5,6 Package Includes: 1Set Eccentric Drill Bit note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.