Unfortunately, there is an instruction manual. The possible application of the five false jaw is for the uninitiated not initially apparent. Here I could be a help: see picture. The missions I have even color-coded, so a wrong combination is excluded. The inserts 1 and 2 are intended for ferrules. Only the metal sleeves are inserted into the mating recess of the forceps and pressed together. The sleeves are designed for wire strands should be verklemt in a sub-distribution, for example. Previously to this, the stranded wires were soldered. The insert 3 is the compression of not insolierten terminals. Here you can use a shrink tube after crimping. The insert 4 is used for pressing insulated cable shoes. Here only the front part of the sleeve is compressed, in which the strand inserted. The insert 5 is also used for pressing insulated cable shoes. Allderdings here is also the rear part of the sleeve, in which the insulated wire is inserted, pressed. What is technology better, 4 or 5, each must try sebst.