Features 1、QUALITY MATERIAL: Expansion pipe repair drill bit is made of industrial grade tungsten steel alloy material with Ti coated, possess long service life 2、MAIN USES: 1/4in expansion pipe repair drill bit can be used for PPR, TPR and other plastic products and other materials opening operating. Possess high hardness, not easy to wear 3、ACCURATE AND STABLE: Water pipe repair drill bit reamer has incisive cutter, accurate size, high processing accuracy, neat and flat drilling mouth, stable feeding 4、STRONG AND PRACTICAL: Water pipe reaming drilling drill bit support wide range of compatible models, not easy to slip; Solid and practical, fluent chip removal 5、PROFESSIONAL DESIGN: Expansion pipe repair drill bit has 1/4in hex shank, fits most power tools. ALL have 90 degree on the point for incisive and accurate countersinking Specification Item Type: Expansion Pipe Repair Drill Bit Material: Tungsten steel alloy Features: High hardness, wear resistant Shank Diameter: 1/4in(6.35mm) Cutter Diameter: Approx. 24-31mm / 0.94-1.22in Package List 1 x Water Pipe Drill Bit 1 x Storage Box