Bi-Metal Hole saws take the form of a short open cylinder with saw-teeth on the open edge, used for making relatively large holes in thin material. They remove material only from the edge of the hole, cutting out an intact disc of material, unlike many drills which remove all material in the interior of the hole. They can be used to make large holes in wood, sheet metal and other materials,that diameter range from 14mm to 200mm
Suitable Arbor for Bi-Metal Hole Saws
Adjustable Arbor For Bi-Metal Hole Saw
3/8" hex shank,with 1/20" -20UNF thread.
Fitting Hole Saw Diameter 9/16" to 1-3/16" (14mm to 30mm)