Sufficient Quantity: you will receive 40 pieces of dry diamond ceramic tile drill bits for drilling holes with a diameter of 1/4 inch (6 mm), enough to meet your use and replacement needs, and you can also share them with people in need Filled with Cooling Wax: the wax lubricant is filled in the diamond core drill bit inside, which can reduce the temperature of the drill bit when drilling, and can be directly dry drilled without adding water, thus increasing the work efficiency and prolonging the service life of the drill bit Scope of Use: the diamond drill bits for tile are suitable for most types of tiles, ceramic, porcelain, marble, granite, ordinary glass and most other hard materials; Note that the drill bit is not suitable for metal and wood Size Information: the ceramic drill bit has a drilling diameter of 1/4 inch, a total length of 2.55 inches, and a width of 0.35 inches, adopting a universal circular drill handle and is suitable for most electric drills, angle grinders, bench drills, etc.; Please confirm the product size before buying Practical Design: the side of the small drill bit set is marked with depth, which makes the drilling depth more accurate, and the side groove design can remove debris faster, which brings you an perfect use experience Features: Solid and reliable material: The diamond kit is made of diamond drill and high strength metal drill body, not easy to deform, durable and easy to punch holes, and will you for a long time. Warm notes: You can shake while punching with the drill bit kit, which is convenient to remove debris and improve the punching speed. Do not press it vertically or hard. Specifications: Material: metal Color: black Size: Drilling hole: 1/4 inch (6 mm) Total length: about 2.55 inches width: about 0.35 inches Package Contents: 40 x pcs Dry diamond drill bits Only the above package content, other products are not included. Note: Light reflection 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.