Hand tools are instruments that rely on its user's own physical force, as opposed to power tools. They may be used by infantrymen to prepare earthwork defenses such as gabions, trenches, and foxholes, although these tasks are nowadays performed with earthmoving vehicles. They may also serve as makeshift weapons, occasionally outperforming purpose-built close combat weapons such as bayonets. Certain military forces such as the Spetsnaz have even created fighting techniques around implements such as entrenching tools.