This lavatory support is engineered for installation on a previously mounted backing plate (furnished by others). Securely welded to pre-drilled heavy gauge steel plates, the internally threaded sleeves of this support are designed to protrude past the wall’s finished surface to accept adjustable threaded arms and arm lock nuts. To ensure that the high back 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.