This lavatory support is engineered for installation on thicker walls where an extension is required before plaster, tile or other finishing surface is applied. Securely welded to a epoxy coated heavy gauge steel plate, threaded support arm extensions are screwed into threaded sleeves to protrude past the wall’s finsihed surface where they accept threaded concealed arms and arm lock nuts. To ensure that the lavatory is solidly affixed to the support arms, our Sure-set locking device adjusts from underneath the lavatory to firmly grip its inner wall while leveling screws ensure a precise installation.