I found this while surfing the net this morning. I have never seen one of these knobby knifes used but it does look like it works well. I am considering ordering one. Has anyone ever used one of these or have an opinion ?

Borrowed from there site ................

http://www.knobbyknife.com/index.html


What is KnobbyKnife?
A powerful 100 Watt heating tool that maintains over 500 degrees heat while cutting rubber.



» KnobbyKnife regains lost gripping performance on used dirt bike tires.
» KnobbyKnife sharpens knobbies quickly and easily.
» KnobbyKnife has an oversized handle that insulates heat and gives more hand-gripping leverage.
» KnobbyKnife gives riders on a budget a new-like tire every time they ride.
» KnobbyKnife gives 3 to 5 times more life to your tire.
» KnobbyKnife saves money by not buying new tires as often.
» KnobbyKnife saves you time because your not replacing your tire as often.
» KnobbyKnife works with any dirt bike tire..no matter the brand.
» KnobbyKnife goes green - decreases items in landfills.
» KnobbyKnife also cuts cab-truck tires

We used to use those to cut treads in dirt stock car tires. They do what they're supposed to do. It's basically a high powered soldering iron.