knife vs LART
While knife can be used as a replacement for LART, the reverse is not generally true; while blunt trauma works wonders on lusers, it tends to be ineffective on cables. Also, note that using knife or one of it's associates as a LART will probably lead to higher level assault charges than one would get with a standard LART.
chainsaw, the power SNIP tool
chainsaw is a version of knife that makes quick work of almost any problem. It also has a correspondingly higher potential for causing unintentional damage. Handle with care.