7pc 1" hole saw set 1.Material:carbon steel 2.Usage:For wood cutting 3.Size: 26mm, 32mm, 38mm, 45mm, 50mm, 56mm, 63mm, 7pc 1" hole ... .We specialized in manufacturing M3/M42 Bi-metal hole saws, carbon steel hole saws,kinds of drills(HSS drills, masonry drills, wood ...