This is the Aqua Lung GripLock Tank Band Assembly For Non Wrapture BCD Features: Finger-saver feature (pat. pend.) 3 presets cover various diameter cylinders in-field Macro-adjustment: Set once until you change cylinder w/a different diameter Micro-adjustment: Can be used for fine-tuning band on cylinder Rubber traction pad Stainless steel cam buckle Hook and loop fastener Aqua Lung&';s GripLock tank band makes changing tanks between dives faster, easier and more comfortable. It comes with 3 adjustable settings on one side and a fine-tuneable hook & loop system on the other, complete with a rubber grip for extra security. The stainless steel buckle features a rubber traction pad for extra stability, while the patented Finger-saver feature eliminates the danger of pinching. Aqua Lung&';s GripLock tank band guarantees that your tank stays in place on any BCD."