The teeth of our Bi-metal Hole Saw are Curved,this design can guarantee for longer life.This is the main superiority of our hole saw.

• Can be used in portable electric or pneumatic tools, vertical drill machines and other machine tools.
  
• For heavy duty cutting in steel plate, pipes, aluminum, cuprum, hardwood, plywood and plastics.
• The set includes 1-1/2"(38mm),1-3/4"(44mm),2"(51mm),2-1/ 4(57mm) Bi-Metal Hole Saws, 1PC hole saw Arbor and 2PC Pilot Drill.
• Double Tooth designed to strengthen each tooth for longer life and improved durability.
• Sharper Tooth Geometry cuts material faster for faster drilling.
• Increased high speed steel height (highest in the industry) improves hole saw durability      
• Open eyelets provide for easier removal of cut materials and increased visibility while cutting