Here's what other sites are saying:
Features of the Petzl String Compatible with 15-20 mm wide quickdraw slings TranspArent, to verify proper installment of the carabiner on the quickdraw sling
Petzl Accessory Biners String Sling Protectorextra Largepack of 10 XL M90000XL.
The String from Petzl is a unique, patented carabiner-holding device for use in a quickdraw system. Named for its resemblance to a bikini, it keeps the lower carabiner in place for easy clipping, as well as protecting the quickdraw from abrasion.
- Summit Hut
Protect your quickdraws from the abrasion and abuse of everyday use with Petzl's String Quickdraw Protectors. These little gadgets hold the bottom biner of your quickdraw in place for easier clipping while protecting the webbing from twisting and rubbing. Comes in a pack 10.
- Mountain Gear