This revolutionary concealed locking system produces tight 90 degree joints in toe kick, filler panels, corner posts and more. Easy-to-use Plinth Lock connectors speed cabinet installation and provide a lasting, gap-free solution for troublesome inside corners. To install, simply screw into place with the 4 screws provided and snap the joint together for a sturdy, clean-looking fit. Each set includes connectors for 6 joints. Patent pending.