HIGH RIGIDITY DIAMOND
This tile hole saw are made from industruial grade carbon steel with nickel plated coated body that resist corrossion . Thicken corundum coating on the tops offers superior cutting strength for maximum drilling outcomes.  
 
EXTRAORDINARY SHARP 
Each hole drill bit was processed by a smooth and exact finish that lower the incision resistance and drill pressure . increase the sharpness and use water lubrication . Excellent for making clean and precise  hole on glass with considerably extending bit life. 
LARGE CLEARANCE HOLE
These ceramic drill bits along with large clearance hole facilitate the entrance of cooling water and escape of chips,making the drilling process more easy and relax.