The smooth part of a drill bit that fits into the chuck.

The channel created by a saw blade passing through the material, which is equal to the width of the blade teeth.

A clamping device that holds an attachment; for example, the chuck of the drill holds the drill bit.

The common power supplied to most all wired devices, where the current reverses its direction many times per second. _______ power is the type of power generated and distributed throughout settled areas.

An electric power supply where the current flows in one direction only. _______ power is supplied by batteries and by transformer-rectifiers that change AC power to _______.

A rating that describes the maximum amps a battery can provide continuously for up to 60 minutes. Drawing more amps than the battery’s rating is possible, but it reduces the amount of time before the battery is drained.

A circuit breaker designed to protect people from electric shock and to protect equipment from damage by interrupting the flow of electricity if a circuit fault occurs.

A drill bit with a carbide tip designed to penetrate materials such as stone, brick, or concrete.

A drill bit that includes steps which enable the user to cut holes in metal to a desired diameter.

A bit designed for use in wood or similar soft material. The design allows it to drill a flat-bottom blind hole in material.

A drill bit with a spiral cutting edge for boring holes in wood and other materials.

A drill bit that uses a lead screw to pull the larger rear portion of the bit into the wood, making it simple to drill larger holes.

A small lever, switch, or part that can be used to activate a locking catch or spring to hold a power tool trigger in the operating mode without finger pressure.

A measurement of the power the tool can deliver.

A safety attachment used to prevent whiplashing in hoses when they are inadvertently uncoupled.

The rotational speed of a motor or shaft, based on the number of times it rotates each minute.

A bit or drill used to set the head of a screw at or below the surface of the material.

A substance, such as sandpaper, that is used to wear away material.

The end of a circular saw shaft where the blade is mounted.

A very hard material made of tungsten _______ and heavy metals such as cobalt. Commonly baked on to the tips of masonry bits and to the edges of saw blades.

Protection against short circuits; a safety device cuts power off as soon as it senses any imbalance between incoming and outgoing current.

The turning force produced by the drill. As the bit’s turning speed increases, torque decreases, and vice versa.

Moving backward and forward on a straight line.

Describe one complete charge and discharge cycle for a rechargeable battery.

A small, T-shaped steel piece used to open and close the chuck on power drills. Cordless drills typically do not have a _______ _______.