1,15years professional manufacture 2,wood hole saw 3,cutting wood,steel 4:size14~380mm 5:export toUSA,EUR,JAPAn welcome ... with us!1.Embody super-excellent performance on drilling in wood,synthetic plastic plate and iron plate;2.The knife edge ... high speed steel and spring steel;3.Adopt imbalanced scale-saw and lateral teeth design,with characteristics of rapid trepan boring ...