Crowd control shields can be round, rectangular, or square. Convex or flat mondels are usually used for policing public gatherings whereas convave models are used in places of detention for cell extractions. They are typically made of polycarbonate and transparent or with a transparent window
Whilst they are used to protect law enforcement officers from projectiles, if they are ssed offensively,
crowd control shields can cause serious injury, especially if the side or edges are used to strike individuals in vulnerable parts of the body such as the head or neck.