[ blade] The of these drill bits provides high processing accuracy, resulting in clean, smooth drill holes for improved efficiency. [Multiple applications] These PPR jacking drill bits are designed for materials such as PPR plastic products and are ideal for hole opening and hole expansion tasks. Size: 1/2 or 3/4 inch size, PPR water pipe internal thread opener pvc plastic pipe electric manual internal thread tool Function: Used to clean or rethread damaged or clogged pipe threads. Versatile: Applicable to pipe fittings without additional treatment or coating., Manufacturer: Akfldms