and size. Each drummer plays a unique part, though the entire bass drum part is conceived as a whole. This allows for a melodic passage to be carried throughout the bass drumline, having runs of notes that flow up or down the drums and in pitch. In addition to these "split" parts, bass drummers will also have unison notes, where everyone plays at the same time. In addition to splits and unison hits, sometimes the basses will play a rim click, in which they will hit a metal bar attached to the rim of the drum. This is mainly used for subdividing rhythms, and are mainly used when the snares play one or more rim shots and the basses have a unison note on the offbeat. Cymbals Marching cymbals are typically pairs of clash cymbals usually around 18 to 20-inches in diameter. Cymbals larger than 20-inches are usually too heavy to be marched comfortably and cymbals smaller than 18-inches lack the sonic capabilities to project from the field to the stands. Oftentimes, each player in a cymbal line will have a different sized pair of cymbals than their peers because to carry out different sounds and tones depending on what the music or percussion director calls for. Cymbals are typically not played in the same manner as orchestral crash cymbals. Marching cymbalists use a special type of grip known as the "Garfield grip" (named after its use by the Garfield Cadets Drum and Bugle Corps) where the hand goes through the leather strap and twists, causing the hand to be flat against the bell of the cymbal. This allows for greater control over the cymbals and for the cymbalists to perform visual effects – movements such as twirls and flips that are eye-pleasing. Among the differences between marching and orchestral cymbal are the many types of specialty crashes and effects. Crash-chokes are played beginning with a normal crash but pulled into the body at the shoulders or stomach as to effectively stop the sound after attaining the desired crash. Slides, or sizzle-sucks, are played using the right cymbal to drive into the left, where the outer edge hits half-way between the bell and the edge of the left cymbal. After the right cymbal slides up on the left, it is brought back straight into the body. The cymbal is stopped by catching the air pocket inside of the cymbals. The