However, these lithics became the basis for stone hammers and chisels. Melee weapons include&colon; blades, hammers and fist weapons. TBMs employing rotating arrays of drills or hammers were patented. Now insane, the lover/patient hammers a chisel into the doctor's brain. Most victims were killed using blunt objects, including hammers and steel construction bars. Due to European influence, some of the later period Cumans wielded war hammers and axes. Police recovered various weapons including knuckledusters, hammers and a meat cleaver. Some modern coach guns feature internal hammers as opposed to the traditional external hammers. For example, flywheels are used in power hammers and riveting machines. These were combined with other objects such as hubcaps, railroad spikes, hammers and glass jars. Pianos need regular maintenance to ensure the felt hammers and key mechanisms are functioning properly. The heads of two sided hammers are usually oval or round. Instead, the smith hammers the iron into shape. Winged hussars sometimes carried additional weapons, such as "nadziak" type of war hammers and battleaxes. On the hilt there is a mark of two crossed war hammers.