in modern drums but historically made from calf or goat skin—along with a rattle of metal, plastic, nylon, or gut wires on the bottom head called the snares. The wires can also be placed on the top, as in the tarol snare, or both heads as in the case of the Highland snare drum. The top head is typically called the batter head because that is where the drummer strikes it, while the bottom head is called the snare head because that is where the snares are located. The tension of each head is held constant by tension rods or ropes. Tension rod adjustment allows the pitch and tonal character of the drum to be customized by the player. The strainer is a lever that engages or disengages contact between the snares and the head, and allows snare tension adjustment. If the strainer is disengaged, the sound of the drum resembles a tom because the snares are inactive. The rim is the metal or wooden ring around the batter head that holds the head onto the drum and provides tension to the head, which can be used for a variety of things, although it is notably used to sound a piercing rimshot with the drumstick when the head and rim are struck together with a single stick. Playing When the top head is struck, the bottom (resonant) head vibrates in tandem, which in turn stimulates the snares and produces a cracking sound. The drum can be played by striking it with a drum stick or any other form of beater, including brushes, rute and hands, all of which produce a softer-sounding vibration from the snare wires. When using a stick, the drummer may strike the head of the drum, the rim (counterhoop), or the shell. The snares can be thrown off (disengaged) with a lever on the strainer so that the drum produces a sound reminiscent of a tom-tom. Rimshots are a technique associated with snare drums in which the head and rim are struck simultaneously with one stick (or in orchestral concert playing, a stick placed on the head and the rim struck by the opposite stick). In contemporary and/or pop and rock music, where the snare drum is used as a part of a drum kit, many of the backbeats and accented notes on the snare drum are played as rimshots, due to the ever-increasing demand for their