Works as advertised.
I got the 15mm version of this to attach a Rocky Mountain Altitude 50 to my buddy's Rocky Mounts TieRod Bike Mount. It works just like I thought it would. My friend has a Rocky Mounts thru-axle adapter and it was a lot more expensive than this one. However, unlike this adapter, it allows you to still lock the bike to the rack. If that were possible with this one, it would have 4 or 5 stars.