I converted 4 LACK shelving units and 16 IKEA VESSLA Storage Crates into 2 dressers.
I stacked the 2 LACK shelves horizontally and connected them with the 3 flat metal brackets.
I removed the wheels off the VESSLA crates and used the Dremel rotary tool with the metal cutting wheel attachment, and cut off all the raised portions off the bottom of the crate so it would be completely flush.
I inserted all the crates in to the opening and they are a perfect fit! Et voila, 2 new dressers!