The electric wire rope hoist model CD1 and MD1have the feartures of compact, light, small sized shape and smooth operation. It can be used not only on the overhead rails, but also be used in contrunction with many types of electric or manical cranes such as single-girdercrance. The double-girder crane, the cantilever crance and gantry crane, the electric hoist model MD1 with two lifting speeds should be used in cases where the hoist model CD1 with the single speed can not meet the requiements for the adjustments during precison operations.