Crowbar

A crowbar, or pry bar, is a hand tool used as a lever to pry apart objects, extract nails, and move heavy materials. It typically consists of a stout steel bar with a curved claw at one end capable of hooking nails and a flatter lip on the opposite end for prying. By acting as a first-class lever, it provides a mechanical advantage that allows a user to lift or separate components with relatively little force.

Common lengths range from about 18 to 48 inches; typical household tools are 24 to 36 inches. Width and thickness vary; minimum is around 3/8 inch to 1 inch. Higher-carbon steel or alloy steel is heat-treated for hardness and durability. Some variants are heat treated for impact resistance.

Types include the standard crowbar (shorter and lighter), the wrecking bar (longer and thicker, with a more robust curved nail puller area), and pinch bars. The nail puller end features a curved claw; the opposite end may be chisel-like for prying along seams.

Uses encompass removing nails, prying apart boards, lifting materials, and demolition tasks. Crowbars are widely used in carpentry, construction, salvage, and related trades, and may appear in emergency or rescue contexts when trained personnel use them to gain access or create space.

Safety and handling: common hazards include hand injuries, pinching, and damage to surfaces. Wear gloves and eye protection; inspect for cracks or bends before use; avoid striking with the bar as a hammer and maintain steady footing and controlled force to reduce the risk of slips or slips.