Patent ID: 7097397

Claim:
A hole-saw assembly including: a first hole-saw aligned along a central longitudinal axis, said hole-saw including a transverse base from which extends a cylindrical hole-saw body having a plurality of cutting teeth, a pair of shafts diametrically opposed about said longitudinal axis extending in the opposite direction to said hole-saw body, and a pair of diametrically opposed apertures radially disposed from said diametrically opposed shafts; a second hole-saw including a transverse base from which extends a cylindrical hole-saw body having a plurality of cutting teeth, said second hole-saw body being of a lesser diameter to that of the first hole-saw body, said second hole-saw further including a pair of shafts diametrically opposed about said longitudinal axis extending in the opposite direction to said hole-saw body and adapted to be inserted into said diametrically opposed apertures of the first hole-saw base, said shaft pairs of the first and second hole-saws being of the same length such that once inserted, the second shaft pair extends a longitudinal distance less than that of the first shaft pair from the base of the first hole-saw; and a mandrel coupled to said first hole-saw base via at least one annulus including a first locking means adapted to engage the shaft pair of said first hole-saw, and a longitudinally spaced apart second locking means adapted to engage the shaft pair of said second hole-saw.