Abstract: A hole making implement of the cylindrical saw blade type for connection with a drill bit and the chuck of a drilling machine is made as a unitary member of sheet metal. The member has an axially split, central sleeve portion adapted to receive the shank of a drill bit and be inserted into the chuck together with the drill bit so as to be fixable, for operation, without requiring a conventional radial clamp screw. The sleeve portion may be provided on conventional hole saw bodies as well.