The is the frame strap system, designed an manufactured by NS Design for their Electric Upright Basses, Omni Basses, and Cellos. It is only designed for use with those instruments, and does not apply to other manufacturers' instruments, or to full-bodied acoustic double basses.
The Frame Strap System fits over the shoulder like a guitar strap, but holds the instrument out from the body in the ideal position for bow and pizzicato technique. A light frame structure is supported by a single guitar style strap extending over the left shoulder. This holds the bass in the correct position for both pizz. and arco styles. With the Strap System to you can achieve full mobility with amazing comfort. (This is a different strap system than the one that comes with the OmniBass/BassCello.)
The lightweight frame design has triangulated body contact points to provide a high degree of stability and comfort.
Convenient height and angle adjustments allow players to accommodate personal styles of play. In addition to the vertical position, the neck can be angled horizontally like a guitar for picking and strumming.
A single wing nut secures the instrument in place for fast set-up and breakdown. The strap system fits both cello and double bass.
Virtually all traditional playing techniques are possible, including thumb position. The instrument neck is tilted back and close to the shoulder, but the body angles out, away from the body for excellent bow access across the full arc of play. This angle also helps traditional bass pizzicato technique to sound and feel natural.
Need to figure out some of the more in-depth features of this product? Here's a copy of the manual, in PDF format, here.
You may wish to visit the manufacturer's website to see if a more recent version is available.
I love this NS Design Frame Strap. I use it for my electric cello (also NS Design) and it’s a perfect fit. Granted, I think I will have to replace my strap with one that gets tighter on my body, but this product is amazing!!! Must buy!!! My delivery came quickly and it was very well packaged. I purchased from Gollihur Music because it is a “mom and pop” business, and they did not disappoint. I will absolutely continue to do business here. Thanks y’all!!