Description: 【Material】: Crafted from quality carbide alloy, the Eccentric Twist Drill Bit is designed for durability and high hardness, ensuring enhanced wear resistance and improved work efficiency 【Feature】: Masonry Drill Bit Featuring 4 flute serrated eccentric and the twist groove allows for effective scraps and heat discharge, the hex shank design allows for stable holing and quick release in an impact drill 【Hexagonal Shank Design】: Featuring a hexagonal shank design for great stability, the drill bit minimize slipping and deviation while providing smooth use at the pipe opening 【Professional Accessories】: Ideal for drill through concrete, glass, ceramic tiles, and other tough materials 【Application】: Drill Bit with the slanted eccentric design can easily penetrate tile, terracotta, concrete, cement, ceramic brick, glass, plastic, cinderblock, wood, and many more Specification: Material: Alloy Size Chart:6mm: Length: 10cm/3.94inch, 8mm: Length: 11.5cm/4.53inch, 10mm: Length: 12cm/4.72inch, 12mm: Length: 12.7cm/5.00inch Package Includes: 1 Drill Bit Kit Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.