Usage Tips:State of the Art Design: These diamond drill bits are the perfect addition to your took kit! The unique circular design removes clean circles, and the side holes discharge slugs automatically for maximum efficiency. Better yet, the shank 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 luxurious diamond dust, these high-quality bits take will provide an unbeatable drilling performance for years on end. Extremely Versatile Hole Saw Set: If you can dream it, you can do it. Diamond Drill Bits will remove a perfect circle from glass, tile, marble, granite, ceramic, and more. The Perfect Size for Every Project: Each hole saw kit includes 12 different sizes ranging from 4mm- 50mm in diameter. Drill small holes, large holes, or something in between. You'll have perfect size for each and every circle. 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. You'll be done in no time flat. A Must-have Hole Saw Kit for Glass Processing, Interior Decoration, or DIY Projects Alike! Ingenious Design Makes Drilling a Breeze Each drill bit comes with a shank that holds the bit in place without slipping. You'll be able to drill clean holes effortlessly! Two side holes on the bits allow for easy slug removal to increase drilling accuracy and efficiency. Obnoxious debris will be removed automatically so that the bits last as long as possible. Notes: 1.These bits are not suitable for drilling concrete or materials that are thicker than 0.5 inch. 2.To prolong the life of the bits, lower drilling speed and wet the surface with water for added lubrication. Material: steel Color: Silver Special Feature: Always use water for lubrication Package Contents: 12x Hole Saw On