Some short axle to axle bow users were noticing a small thump when using the previous STS model. In order to rectify that problem, STS has created the double STS archery system. The double STS archery system mounts to the front or rear stabilizer hole on your bow, depending upon the model used, and utilizes two STS stoppers to dampen noise and vibration. The rear mount double STS archery system is shown to the left on a Switchback XT.

The new E.D.S. ( Extreme Dampening System) stopper on the end of the STS should be barely touching your string once installed correctly. When you shoot your bow, the string will contact the E.D.S. stopper, thus stopping the normal forward travel of the string. Instead of traveling past the string's resting point (a common cause for wrist/forearm string slap and many errors cause by movement during the shot), the string is stopped at the resting point. This allows you to be more accurate without the worry of string slap or fouled shots due to excessive movement. In addition, the STS system is an effective dampener. This will allow you to remove the speed robbing string silencing accessories, thus giving you more speed.

Included with the STS system is serving material. Though not likely needed, you can wrap this around your bowstring where it contacts the rubber stopper to ensure that there is no excessive string wear. For those of you who prefer not to serve your string, please use some extra bow string wax in the area the E.D.S. stopper will come into contact with your string.

Also, included in the new STS's is a BigJax rod dampener made by the BowJax Co. Slide this onto your STS rod to take out additional shock and vibration.

The new E.D.S. stopper is made from a softer rubber material to make it more quiet and more absorbing for noise and vibration.
The STS system is made from aluminum, so it will not bend or break as many cheap plastic imitations.