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Industrial inspector wearing a thermoplastic hard hat in Cologne, Germany. A hard hat is a type of helmet predominantly used in hazardous environments such as industrial or construction sites to protect the head from injury due to falling objects (such as tools and debris), impact with other objects, and electric shock, as well as from rain.
The simplest form is a hard shell with reinforced padding, and a chinstrap and a hinge-up (usually polycarbonate) visor, as in this image. These riot protection helmet visors are usually curved sideways and straight up-and-down, not curved both ways like on the older type of motorcycle helmet. One accessory is a back-of-the-neck protector.
If desired, a face shield can be attached to the front. The Newer "Metro" helmets (the name given by several leading helmet manufacturers) with smaller brims and rounded edges are also much lighter than both leather and composite traditional helmets.
Racing helmets also have face shields (narrower than motorcycle helmets) to protect against fire and impact. Riot protection helmets have visors to protect the eyes and face from projectiles and impact. Safety helmets, also called hard hats, used by chainsaw operators and construction workers often have visors to protect the eyes from impact.
Workers at Chittagong ship breaking yard, without safety boots and hard hats U.S. police officer with a riot shield. A shield is held in the hand or arm. Its purpose is to intercept attacks, either by stopping projectiles such as arrows or by glancing a blow to the side of the shield-user.
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