Carrier Plate with screwed Angle Target Unmistakable survey points 3-dimensional monitoring of bridges Roads no longer need to be closed or obstacles crossed as every measuring point can be checked from a distance of up to 200m, range depends on the measurement equipment Simple and quick measurement and monitoring of buildings, façades, supporting structures, pillars, high rack storage facilities, dams and many other objects requiring monitoring This measurement plaquette with two already mounted reflex targets enables 40 x 40 mm from the precise and measuring at least one mark of almost any position. Size:120 x 75 mm, mounting holes 6 mm dia. Suitable for sticking or plugging. For monitoring the formwork during concrete pouring, e.g. for bridge arches, single-faced wall formwork For monitoring railway tracks where there is surrounding building work e.g. bridge and tunnel construction, pressure grouting of railway lines, etc. Measurements and monitoring are possible from virtually any angle and at locations which are difficult to access Crosshairs are imprinted on the backing plate under the exact centre of the reflective target to the survey point is durably marked. If the reflective target is at any point, it can easily be replaced and the old survey point can be restored quickly, easily and cheaply. Color:Red Material:plastic Package Contents: 1 * Angle measurement plaquette Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.