The split-finger fastball, or "splitter", is truly an off-speed pitch rather than a type of fastball. Like the changeup, to which it is a close relative, it is thrown with the same arm motion as a normal fastball, but the adjusted grip causes it to behave quite differently. The ball does not have the characteristically tight spin of a fastball. The ball appears to tumble in a knuckleball-like fashion; but it is much faster than a knuckleball. The ball is gripped tightly with the index and middle fingers "split" along the outside of the horseshoe seam. It is important that at least one finger is touching the seam, as the ability to control the release of the ball is derived from this contact. The release is the same as a fastball. A splitter usually drops as it approaches the plate, and breaks to either the right or left. The forkball is a similar pitch, though it is slower and gripped with a more exaggerated split of the fingers. A pitcher generally needs long, flexible fingers to effectively throw this pitch. Due to similarities in speed and movement, some pitchers' split-finger fastballs are misidentified as changeups.