... 3.Size: 26mm, 32mm, 38mm, 45mm, 50mm, 56mm, 63mm, 7pc 1" hole saw setSize: 26mm, 32mm, 38mm, 45mm, 50mm, 56mm, 63mm,About our ... 1995.We specialized in manufacturing M3/M42 Bi-metal hole saws, carbon steel hole saws,kinds of drills(HSS drills, masonry drills ...