For masonry or stud wall installation, the epoxy coated heavy gauge steel plates of our wall mounted high back lavatory supports clamp to wall framing to meet height specifications. Sleeves are internally threaded to accept horizontal adjustment of the threaded concealed arms and arm lock nuts. To ensure that the lavatory is solidly affixed to the support arms, our Sure-Set™ locking device easily adjusts from underneath the lavatory to firmly grip its inner wall while leveling screws ensure a precise installation.