1,15years professional manufacture 2,Bi-mental hole saw 3,cut wood,steel,pvc 4:size14~380mm 5:hot to USA,EUR,JAPAN Welcome to visit our web!We provide:TCT hole saw,Bi-metal hole saw,Wood hole saw(boring bit),diamond glass hole saw,glass/tile drill bits,hammer drill bits. Looking forward to hearing from you! BI-METAL HOLE SAW SIZE: ModeModemillimeter (mm)millimeter (mm)2-1/2" S1- 210~400