hole saw 1, superior quality 2,durable in use 3,dependable performance 4, complete in specifications hole saw1,M3/M42 High Speed Bi-metal ... Duty Cutting.2,4/6 TPI variable Teeth3,Cutting Safely and Efficiently,the Best Way to Cut Large Hole,Clearing the Chips ... )5,Diameters from 9/16"--8-17/64"(14-210mm)6,Can be used in Portable Electric or Pneumatic Tools,Vertical ...