Two “PSR Elastic Bands” and the “PSR Magic Suction Tape” are currently included with the purchase of every shoulder rest. The “PSR Elastic Bands” are not like rubber bands. The “PSR Elastic Bands” are made of synthetic non-latex material that will not dry out or crack. The “PSR Elastic Bands” are ultra thin, and will slide effortlessly under the “end gut” and attach to the points of the “C bout.” The “PSR Elastic Bands” will last a long time if they always remain stretched and connected to the points of the “C Bout.” To install the shoulder rest, simply lift up each side of the elastic band while sliding the shoulder rest underneath.