The document describes the components of an SO-260 Field CBR Test Set used for determining the CBR value of soils in place according to ASTM D-4429. The set includes a 5 ton capacity jack, penetration piston, extension rods, reference beam, surcharge weights, proving rings, and other accessories needed to perform CBR testing of soils. Additional items like a moisture content test set, stop watch, levels, trowel, chisel and hydraulic jack are recommended for use with the CBR test set but are not included as part of the described SO-260 set.