Double Optical Square DJ-2 (Double Penta Prism)

Double penta prism for fast right angle sighting in either direction. Easy to use, simply hold the handle then sight through the yellow lens in the middle to align to a target, then through the clear prisms above and below you can see at right angles to your left and to your right.

To get even more accurate there is a slotted hollow handle for attaching a plumbob cord and the extra wide viewing window makes targeting easy.