A tool designed to apply a rotational force, measured in inch-pounds (in-lb), to fasteners like screws and bolts, ensures proper tightening and prevents damage. For example, a delicate electronic component might require only a few in-lb, while a large structural bolt might need hundreds. The specific measurement ensures consistent and predictable clamping force.
Accurate fastening is crucial in numerous applications, from manufacturing and construction to automotive repair and electronics assembly. Over-tightening can strip threads or damage components, while under-tightening can lead to joint failure. Historically, fastener tightening relied heavily on feel, leading to inconsistencies and potential problems. The development of tools that precisely measure and apply torque has significantly improved the reliability and safety of countless assembled products.