IKEA Snap On Hook

Hooks into the holes on the backside of the IVAR posts when installed.Snug fit and holds quite some weight once installed. Normal Fit can be removed by hand but sits a bit loose as seen in the images. It won't come off unless you remove it, but it has a bit of wiggle room.Tight Fit version can only be pried off using a screwdriver or another small implement to get the hooks out of the mounting holes. This version is really tightly pressed onto the post.