[High-quality material] This set of diamond hole saws is made of high-quality alloy material with diamond frosted, which can meet your work needs. Improve your work efficiency [Product Features] Accurate drilling can be achieved without additional drilling tools. When water needs to be added during long-term work, the bit temperature can be prevented from being too high, the bit can be protected, and the service life of the bit can be prolonged. [Scope of application] It is suitable for all kinds of stone tools, stone materials, including marble and ceramic tiles, etc., and can be used for decorative drilling of industrial buildings and houses. drills can effectively improve work efficiency. [Product adaptation] The product is adapted to M14 thread, drill diameter 20/28/35/55/68mm with 20mm Finger Bits and M14 Adapter Drill. Suitable for most angle grinders. Colour: Gold Material: Diamond Coated, Alloy Package Contents: 5 x Hole opener 1 x 20mm Finger Bits 1 x M14 Adapter Drill Only the above package content, other products are not included. Note: Light 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.