The long thing on a turntable which is pivoted at the back and at its end has provision for a cartridge to be attached. These normally provide for an adjustable tracking weight by the use of a spring-loaded or weight-loaded mechanism at the back, and usually have a damped cueing lever to allow the stylus to be gently lowered to the surface of the record. Over the years some makers have provided parallel tonearms which do not use a pivot, but a motor-driven rack at the back which gradually moves the rear of the tonearm as the width of the LP is traversed.