Abstract: A holder for at least one eyepiece is described. The holder includes an upper plate having at least two upper apertures therethrough, a top surface, and a bottom surface, and a lower plate having at least two lower apertures therethrough, a top surface, and a bottom surface. Each lower aperture corresponds to one of the upper apertures of the upper plate. When the upper and lower plates are mutually aligned, the at least one eyepiece may be inserted through corresponding upper and lower apertures. Furthermore, when one of the plates is selectively slid with respect to the other plate, the upper and lower apertures become misaligned to bind the at least one eyepiece to retain the eyepiece in the holder.
Abstract: An offset hoisting apparatus comprises a rigid boom having a hook at a distal end thereof. The offset hoisting apparatus further includes a front mount having a front boom aperture and a rear mount having a rear boom aperture, each being adapted for confining the boom to slidably move therethrough. The invention has a slip collar having a slip collar boom aperture therein for receiving the boom therethrough and an offset hoisting apparatus attachment having a flexible linkage fixed at a distal end thereof with the slip collar. The boom is selectively slid between a retracted and an extended position and the load is secured to the hook. The crane apparatus then lifts and positions the load to a building.