Maxpedition Keyper
The Keyper is a solid keyring from maxpedition that can be used as a keyring or as an attachment point for several items in backpacks, bags and other items.
The keyper has double loop (3 straps) of cordura nylon with reinforced stitches that closes using strong velcro. The three straps allow your belt or attachment strap to remain isolated from the velcro and then the velcro closure has contact in 100% of its surface for a stronger result. Attached to the loop is a metallic spring clip, the clip has an "eye" that can be used to pass a splitring or some paracord if needed.
The belt/backpach attachment loop is extremely strong and resistant regardless of the weight the keyper will not dettach or fall. The metal clip is quite good but the spring might lose some tension with constant use but not enough to make splitrings fall.
Retailing for about $9 the keyper is a very solid keyring and attachment accesory for your backpacks. You can read more in Maxpedition website.