Northwest Instruments NPA63 Adjustable Prism Assembly with 0/-30 mm Offset, Tilt Holder and Padded Bag - NWi

The holder lets you position the prism so its optical centre sits at 0 mm or at -30 mm from the pole axis. Set your total station's prism constant to match the offset you are using, and your distances will be correct.

A 5/8 x 11 thread, the standard on prism poles, tripods and tribrach adapters, so it fits most setups you already own.

No. The NPA63 is sold without a prism pole. It comes with the prism in its 64 mm canister, the adjustable holder, the suspended target and a padded nylon bag.

Yes. The holder tilts so you can aim the prism squarely back at the instrument on sloped or uneven ground.

It is a passive prism target, so it works with EDM total stations that measure to a prism, including the Northwest Instruments NTS03.