NPH31 Single Prism Holder TS21744 it is dust-proof and water-proof

it is dust-proof and water-proof making it suitable for any job site

It is a good idea to keep a spare Keson MP401 Replacement Measuring Wheel on hand

Its round head

tips and practice examples in an easy-to-understand format to help get the most out of the Construction Master Pro

stick it in the case and close it

NPH31 Single Prism Holder TS21744 it is dust-proof and water-proofThe Northwest Instrument NPH31 Single Prism Holder is an essential accessory ideal for all surveying applications. It securely holds a single prism and offers an offset of 30 millimeters. For accurate positioning, this prism holder allows tilting at various angles.