Kerf is the notch made when material is lost during a cut. The width of this notch is relative to the blade tooth width.

Kickback is a safety hazard that causes violent and sudden bucking of a saw or ejecting of material from the saw at high speed towards the user – see “Binding”

A kickback arrestor is a safety feature on a table saw that only allows the material to move front to back when cutting, thus preventing the material being thrown forward during a cut

A king stud is the last full stud on each side of a rough opening. It helps hold the rough opening assembly parts together and connect them to the top and bottom plates.

Knitted is alooser roller cover fabric backing. Holds more paint but yields less of a smooth finish than woven covers

A knot is a tough, usually dark spot in a board where a tree limb once was.

Krypton is gas filled between glass panes to slow heat transfer through a window