Timberjigs
Encyclopedia
A Timberjig is a light-weight device that is fitted to a chainsaw
Chainsaw
A chainsaw is a portable mechanical saw, powered by electricity, compressed air, hydraulic power, or most commonly a two-stroke engine...

 and makes it possible to cut straight squared boards and planks from a log. The first cut is made with an aluminium
Aluminium
Aluminium or aluminum is a silvery white member of the boron group of chemical elements. It has the symbol Al, and its atomic number is 13. It is not soluble in water under normal circumstances....

or home-made wooden guide rail that is attached to the log ends. The following cuts are guided by the previously sawn surface.
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