Stone Pro ADA Compliant Countertop Support Demo 

https://www.braxton-bragg.com/index.cfm/fuseaction/store7catalog.level/bc/0,10719/ Stone Pro Countertop Support is ADA compliant and is one of the best way to mount and secure wall vanities or desks. A natural stone countertop support that is wheelchair accessible. It can be set at the appropriate height for ease of use by someone in a wheelchair. Please visit link for more details!
https://www.youtube.com/watch?v=dlOmDQiAzVM