Hello most mischievous one. Molded in superb cylindrical style, this device, controlled by hand, is able to control and slow down that massive cylindrical engine. Release the hand brake, and that mighty engine is able to thrust again full throttle. Full of tubular objects, of a hydraulic nature, that hand brake works its powerful magic. In effect o evil one, what you are portraying here, with this magnificent handbrake, is the ultimate "handjob." Oy. Michael.