All-Suture Anchors for Instability Repair Competitive Matrix | 2 Arthrex FiberTak® and Knotless FiberTak Anchors Family Summary Soft anchors for shoulder instability available in knotted single-loaded, 1.6, double-loaded 1.7, and knotless 1.8. Also available in knotted and knotless 2.6 options for rotator cuff repair (RCR).