Most clutch cable breaks happen at the lug in the lever. The reason is that this lug needs to slightly rotate on operation but if it's not lubed properly it doesn't rotate. That means the slight rotation has to be taken up by the cable wire itself bending. The trouble is, that lug is soldered onto the cable and if the cable bends close to the lug it stresses the soldered joint. Sooner or later it will give way.
This is a clutch emergency kit, one of many out there. It's designed for when the cable leaves you stranded somewhere. It's just an inner cable and an assortment of lugs that screw on instead of being soldered.
Thats good info Dr. Shifty, just ordered one of those kits. Seems hard to beat for $10 bucks. Good thread and good info. Thank you.