1)Normal size:16,19,20,25,30,32,35,38,40,42,45, ... to drill metal panel 2)Iso9001:2008 management system pipe hole saw1) Variable pitch teeth for faster, smoother cutting and less ... )We can be design as per your specification7)Normal size:16,19,20,25,30,32,35,38,40,42,45 ...