State of the Art Design: These diamond drill bits are the perfect addition to your tool kit! The circular design removes clean circles, and the side holes discharge slugs automatically for maximum efficiency. The design prevents slipping and holds the bit securely in place. 12-in-1 Powerful Diamond Dust Hole Saw: Take your drilling to the next level. Thanks to the diamond dust coating, these high-quality bits provide excellent drilling performance on suitable materials. Extremely Versatile Hole Saw Set: These diamond drill bits can be used on glass, tile, marble, ceramic, and similar hard materials. The Perfect Size for Every Project: Each hole saw kit includes 12 different sizes. Drill small holes, large holes, or something in between. You'll have the right size for each task. User Friendly: These bits are great for amateurs and professionals alike! Drill diagonally to score your hole, and then hold the drill at a 90-degree angle to bore through the material. Efficient and easy to use. A Must-have Hole Saw Kit for Glass Processing, Interior Decoration, or DIY Projects! Ingenious Design Makes Drilling a Breeze: Each drill bit comes with a secure fitting design that holds the bit in place without slipping. Two side holes on the bits allow for easy slug removal, increasing drilling accuracy and efficiency. Debris is removed automatically to help extend bit life. Special Feature: Always use water for lubrication during operation. Notes: 1. These bits are not suitable for drilling concrete or materials thicker than 0.5 inch. 2. To prolong the life of the bits, use a lower drilling speed and apply water for added lubrication. Color: Silver Material: Metal + Diamond Package Contents: 12 x Drill Bit Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement may vary by +/- 1-3 cm.