Hole Cutter With Exchangeable Arbors
A countersink bit is a type of drill bit that allows you to widen the entrance to a pilot hole so that the screw head is flush with the surrounding metal rather than sticking out on top of it.
What are Hole Saws or Hole Cutter?
A hole saw or hole cutter consist of steel cylinder mounted on anarbor and construction with power drills to cuta circular hole through a workpiece.Most hole saws have fairly short aspectratio of diameter to depth and they areused to cut through relatively thin workpieces .