Penis stretcher devices or penis extenders are the devices designed to apply continuous stretching force, known as "traction", to the penis in order to permanently lengthen and enlarge it.
Penis stretcher device applies traction by means of adjustable, calibrated bars between an anatomically curved base that fits comfortably at the root of the penis, and a surgical-grade band that slips off the head of the penis.
As the penis lengthens, the traction and distance can be adjusted. This device is meant to be discreetly worn under the clothes and/or during sleep. Marketed under different names such as FastSize Extender, ProExtender and X4 Extender, the device can be obtained from your medical practitioner or online.