I own a pair of IKEA Veberöd (Veberod) shelves, which I really like. The frames are made out of steel square tubing and the shelves and drawers are made of finished plywood.
My only complaint about the shelves is that they don't have stops for the drawers. They ride on steel runners which are open on both ends. Unless I carefully positioned each drawer, they didn't sit flush with the frame which really caused my OCD to flare up.
The clips in this Thing attach to the steel frame behind every drawer and provide a satisfying stop by way of little protrusions or wings, keeping all the drawers aligned and allowing me to sleep at night.
There are three clip styles:
1. **Single Clip**: Attaches to the frame posts at the back of each drawer. If you have only one Veberöd shelf, you'll need 2 of these single clips per drawer -- 6 in total.
1. **Double Clip, with wings**: Attaches across the frame posts of two Veberöd shelves which are side-by-side. If, like me, you have this configuration of shelves, you'll need 1 single clip and 1 double clip per row of drawers -- 3 single clips and 3 double clips total.
1. **Double Clip, without wings**: Like its winged sibling, this clip provides a way to connect two adjacent Veberöd shelves, but are designed to be used on non-drawer shelf rows. They provide additional support without unsightly protrusions.