This is a must have if you're running making ethernet cables. The adjustable razor blade is handy so you don't penetrate the jacket too much and cut into the twisted pairs. For the money I doubt you could find one better than this.
Anybody I'm working with seems to love these so much, they decide that they want mine. Being that these are so inexpensive (not cheap), I look the other way. I just make sure to order a few at a time so I don't run out.
PROS: Price Works as advertised Simple Safe
CONS: Blue Order many, other techs will take yours
For the price paid... this tool is a bargain. I used it mostly for removing the sheath off of CAT 6 cable. It works great. The nice thing is that you can adjust the depth of the cutting blade. With proper adjustment, you will not cut the wire beneath the sheathing.