1,15years professional manufacture 2,TCT,Bi-mental,HSS hole saw 3,cutting wood,steel 4:size14~380mm 5:export toUSA, ... EUR,JAPAN Professional manufacture of hole saw ModeDiameterModeDiametermillimeter (mm)inchmillimeter (mm)inchS2-14149/16"S2-65652-9 ... to the metric. 2.the width of saw belt: L1-27 L2-34 L3-41 high grade HSS M42 Bi-metal hole saw