Portable handheld device for forming aligned holes

Claim 1

A portable, handheld device comprising a rotatable cylindrical column of predetermined length for supporting at one end a hole saw or the like, for being driven in rotation at the other end by a drive means, and for being temporarily and releasably secured at two or more locations along its length by conduit clamps or the like which are fastened to a building wall or house wall in spaced predetermined alignment; said rotatable cylindrical column having at said one end means for receiving and being connected to said hole saw or the like, having at said other end means for being drivably engaged by said drive means, and having two or more annular spacing collars encircling the outer surface of said rotatable column in close slidable and rotatable relation; said annular spacing collars being slidably adjustably spaced along the length of said rotatable column for positioning at said two or more locations, and adapted to be temporarily clamped at said locations by said conduit clamps or the like; and said rotatable cylindrical column also comprising a tubular member having therewithin an extension member adapted to be slidably extended from and relative to said tubular member to different predetermined lengths, and said extension member and said tubular member having cooperating locking means adapted to lock said extension member to said tubular member at said extended different predetermined lengths, said extension member having at its free end said means for receiving and being connected to said hole saw or the like.