Hidden triangulated spring plate is mounted behind the convex glass that will not vibrate or loosenHeavy-duty stainless steel internal pivot hardwareCNC machined pockets and a beveled edgeConstructed with forged billet aluminumStandard and metric hardware includedLaser engraved Arlen Ness® logoWhen ordering hanger stem for under-mount applications, order the opposite right- or left-side fitment.