100% brand new and high quality and professionalCuts quickly， precise holes in Steel， Stainless Steel，iron， Copper， Brass， Aluminum， Fiberglass， Formica And Other Laminates In SecondsPerfect for Installing Locks， Knobs in Doors and Cabinets or Drilling Larger Diameter Holes Through Desks Etc.Can be used as car bus truck parking sensor radar system drilling holeProvide 5 kinds of hole saw ，meet your professional needsSpecification:Size (Outside dia.) :16/18.5/20/25/30mmPackage include:5 pcs HSS Drill Bit Hole Saw Set