General description The Mophorn Diamond Holesaw Set includes 6 professional-grade diamond drill bits, designed for precise and clean drilling in tough materials such as ceramic, tiles, granite, marble, stone, and porcelain. The set features sizes ranging from 20mm to 68mm (0.79" to 2.7") and is equipped with M14 threading for quick installation. This set is optimized for dry drilling, keeping your workspace clean without the need for water. Technical specifications Carborundum Height: 13 mm (0.5 in) Drill Bits Diameter: 20/25/40/45/50/68 mm (0.79/1/1.6/1.8/2/2.7 in) Total Length of Each Drilling Bit: 60 mm (2.3 in) Gross Weight: 1.5 kg (3.3 lbs) Mounting Thread: M14 Package Dimensions (L x W x H): 20 x 17 x 10 cm (7.9 x 6.7 x 3.9 in) Installation To use these diamond drill bits, simply connect them to an angle grinder and start with a pilot hole to prevent the saw from drifting. This ensures accurate drilling and efficient cutting. Usage These drill bits are ideal for creating clean,