UPGRADE - Spiral blade enhances performance by 30% and comes with limit position design to prevent penetration of pipes. EFFICIENT EXPANSION - The innovative design of this drill bit allows for efficient expansion of PPR water pipes, facilitating quick and effective repairs without compromising structural integrity. VERSATILE COMPATIBILITY - With multiple sizes available in the set, these drill bits offer versatility in application, making them suitable for a wide range of pipe diameters commonly found. Colour:As Shown Material:steel Package Contents: 3 x Stepped Drill Bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.