The Nitecore NHL01 is a patch with a Velcro backing. Velcro is also referred to as hook and loop. The patch has a large adjustable loop that you can use to store a large flashlight, a bundle of paracord or a large pocket knife. Nitecore makes these components as accessories for the Nitecore EDC and Excursion bags. You can also wear this component on a tactical vest or a tactical backpack that has a Velcro section.
The diameter of the loop is adjustable from 4.6 cm to 8.0 cm (if kept flat). There is a long elastic loop along the side. You can use this to store a pen or a very slim pocket knife.