[Diamond Hole Drill Bit Size] This dry diamond core drill bits kit includes 10 pieces of 6mm diameter drill bits with a 1/4 Hex design, measuring 65mm in length.<br> [Dry Drilling] Designed for dry drilling, these bits can melt and cool the cutting surface; water can also be used as a coolant to enhance longevity.<br> [Wide Application] The diamond hole saw set is versatile, suitable for drilling ceramic pots and various hard materials like tile, glass, marble, brick, and stone.<br> [1/4 Hex] The hex design of the drill bits fits securely in electric drill chucks, reducing slippage and improving efficiency.<br> [Friendly Reminder] To prolong drill life, start drilling at a 45-degree angle and then gradually adjust to 90 degrees during high-speed operation.<br> <br> Please note that slight color differences may occur, but this does not affect usability. Items may be shipped with or without scales randomly and cannot be specified.<br> Color: Black<br> Material: Diamond<br> <br> Package Contents:<br> 10 * Diamond Drill Bits<br> <br> Only the listed contents are included; other products are not part of the package.<br> Note: Lighting and display variations may slightly alter the item's appearance in pictures. Measurement tolerance is +/- 1-3cm.