Seco Manufacturing offers a variety of professional survey equipment, as well as a number of accessory products that can be used in the field.
 
This new combo allows easy conversions from “control” to “topo” surveys. The quick-release pin and matched drill holes are the key! Point weighs 0.15 lb (0.07 kg)  Topo shoe weighs 0.20 lb (0.09 kg)