Features: Engineered with spirals flute design for faster drilling efficiency, these 6piece hexagonal shank Lifting Stepped Drill Bit effortlessly penetrate PVC pipes, solving slow drilling issues in plumbing repairs while maintaining precise. Crafted from wear resistant high speed steel with treatments, these durability bit offer longer lifespans than standard stainless steel alternatives, ideal for repeated pipe repair tasks. Perfect for professional plumbers and enthusiasts, the 1/4" hexagonal shank ensures quick compatibility with most power tool, enabling rapid bit changes during complex pipe restoration projects. Features a selfcentering tip for drilling in tight spaces, essential for home plumbing repairs, construction site, and industrial pipeline maintenance requiring millimeter accuracy. Antistick coating prevents buildup between flutes, combining durability with easy maintenance for seamless transfer between irrigation systems installations. Specifications: Component: High Speed Steel Diameter:6.3cm/0.25in, 5cm/1.97inch, 4cm/1.57inch, 3.2cm/1.26inch, 2.5cm/0.98inch, 2cm/0.79inch hexagonal Shank:6.35mm; Applicable Scenarios: Water Pipe Installation, Line Installation Package Includes: 1set/6pcs Lifting Stepped Drill Bit(63mm/50mm/40mm/32mm/25mm/20mm) note: Please allow 1-3cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.