Dual Hole Cutter

[Features]
· One blow and it's through composite material, single plate material, or nailed wood.
· Patented overlapping cutting edge shape.
· Can drill through holes even in wood with nails in it or when "there might be metal on the opposite side".
· One-touch attachment/removal type.
· Cutters and shanks are attachable/detachable with one touch and chips can be discharged easily (attachable/detachable without a tool).
· The shanks are applicable with all sizes.
· Four types of shank can be mounted, including the standard shank.