The Waring/Qualheim 027170 Left Push Knob is a toaster control component used for manual operation of the associated function. Its left-side position distinguishes it from other control knobs used on the equipment. The push-style design provides a direct control point for the toaster during normal operation. This component is identified by its 027170 specification and is associated with commercial toaster equipment. It is applicable to equipment configurations that use a left push knob.