jointer is an electrically powered tool used to cut neat slots in
woodwork, into which small wooden inserts - called biscuits - are
placed to form a discreet, flush joint between two pieces of wood.
Jointers come in two types, a fixed table mounted type, and (as
pictured here) in portable varieties.
In order to cut the correct sized slots, and at the correct depth,
jointers have adjustable brackets to precisely set the depth and
position of the cut.