Air Dried
Wood that has been cured by natural air-drying
All-Purpose Blade
Circular saw blade with a tooth configuration designed to perform both crosscutting and ripping operations; also called a combination blade
Allen Wrench
A six-sided bar, usually L- shaped, used to turn screws with recessed hexagonal heads; sometimes called an Allen key
Alternate Top Bevel
A type of saw blade where the teeth alternate between left and right-hand bevel
Ampere/Amp
Measurement of electronic current, usually used in reference to power of an electric motor or circuit
Annual Growth Rings
Rings visible in wood end grain separating early wood from latewood; also called growth rings
Anti Kickback Pawl
A table-saw attachment that allows cutting stock to move freely forward but whose teeth dig into the material to prevent it from ejecting backward toward the operator; also called antikickback spur
Apron
Rails around the base of a table to which the top and legs are joined
Arbor
A motor’s axis or rotating shaft to which a tool is attached, such as a table-saw blade or a router bit.
Architect’s Ruler
Usually a three-sided ruler marked with different measuring scales
Auger
A wood-boring device or bit
Awl
A sharp-pointed tool for piercing small holes in wood or other material