New 5002AD4 Accelerator double-pedal with carry bag. Model# DWCP5002AD4 The New Accelerator (AD4) drive system offers an eccentric motion that creates an indirect relationship between the sprocket and the footboard, increasing the velocity of the pedal by shortening the length of the stroke. It is recommended for situations that require increased speed and sensitivity. This pedal is a tried and true workhorse! Please see our other listings for additional double pedals and Drum Workshop equipment. Dale’s Drum Shop is an authorized Drum Workshop dealer. A Drummer will respond to you promptly. Drum Workshop Model: DWCP5002AD4.