TROY 27418 Tungsten Carbide Hole Saw, Ø 18mm

● Diamond coated hole saw
● Ideal for drilling clean and accurate holes in glass, marble, tile, granite and other very hard materials
● Each holesaw has a shank that allows for use with all rotary tools 
● Wet cutting is recommended as it reduces the amount of dust, flushes out the slurry 
● Cuts a lot quicker and greatly extends the tool life by cooling the cutting edge.
● If you MUST dry cut then drill 5 seconds and rest 10 seconds to avoid overheating.
● Never use hammer action it is less effective and the holesaw may be damaged
● Use a plywood template for cutting, that can be secured to whatever you are cutting to ensure that it doesn't move from side to side.