Accurate Engineering: All the tips of the pipe lifting drill bit are engineered at a 90 degree angle, to achieve incisive and accurate counterboring, ensuring clean and precise drilling surfaces Lifting Drill Bit Set: This set includes three lifting drill bits with specifications of 15-19mm, 18-24mm, and 24-31mm respectively. Featuring a 1/4 inch hex shank, they are compatible with most power tools Sturdy Construction: Made from industrial grade 40Cr steel material, and features ti coating, these pipe lifting drill bits are robust, lasting, and built to last, offering long term durability and reusability Incisive Cutting: These stepped reamer bits feature incisive cutting edges to ensure high machining accuracy, resulting in clean and glossy drilling holes, improving hole reaming and drilling efficiency Versatile Applications: Specifically designed for PVC, PPR, and other plastic pipes, these lifting drill bits are suitable for drilling and reaming tasks, making them versatile for a range of applications