Features: Using high hardness alloy materials, it has excellent wear resistance and compression resistance, and can easily drill through concrete and steel bars, with a drilling diameter of up to 50mm. The unique center guide tip design ensures accuracy during drilling, reduces deviation, and improves drilling efficiency. This water drill bit has improved accuracy by 20%, enabling every hole home decoration and professional construction to achieve ideal result. Builtin quick drainage channel effectively reduces impact force and frictional heat, extending service life by up to 30%. This feature is particularly suitable for projects that require a large number of perforations, ensuring stability and reliability even after long-term use. Suitable for home decoration, construction sites, and industrial equipment installation, capable of flexible operation on concrete, bricks, and other materials. Both professional workers and DIY enthusiasts can easily adapt to various construction scenarios and meet the needs of different users with this product. Standard 1/2-inch interface design, suitable for most electric drilling rigs, users only need to replace them easily to use, without the need for additional tool. This feature enables users who need to drill holes temporarily to quickly get to work, especially suitable for quick response during emergency repairs or on-site construction. Specifications: Material: Diamonds Diameter:32mm/1.26'',38mm/1.5'',40mm/1.57'',44mm/1.73'',51mm/2.01'',56mm/2.2'',63mm/2.48'' Package Includes: 1Piece Hole Opener 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.