This 20mm RUBI Cylindrical Diamond Grinding Bit is the larger size option, making it the ideal choice for more substantial hole modifications and faster material removal on landscaping materials. The 20mm diameter provides excellent coverage for enlarging medium to larger diameter holes efficiently whilst maintaining professional results. Specially designed to enlarge or modify the diameter and shape of previously drilled holes, this grinding bit is equally effective for smoothing, polishing, and cleaning the inside edges of existing holes. The diamond-coated cylindrical surface delivers consistent performance and extended tool life, even under demanding professional use. Features and Benefits: • 20mm diameter ideal for larger hole modifications and faster material removal • Professional diamond grinding surface for superior durability • Cylindrical design ensures uniform hole enlargement • Perfect for smoothing and finishing internal hole edges • Suitable for use on landscaping materials • Not suitable for drilling new holes - grinding and modification only Contents: • 1 x RUBI Cylindrical Diamond Grinding Bit 20mm Specifications: Wheel Type: Grinding Stone Diameter (mm): 20 Max. Drill Length: 50mm. Revolutions per Minute: 11,000 max.