What is a Z Clip? Monarch Z Clip Hanging System - YouTube
Aluminum Z Clip
2'' French Cleat Picture Hanger, Heavy Duty Aluminum Z Clips with Screws, Interlocking Wall Mounting Brackets for Hanging Panel, Whiteboard, Cabinet, Shelf, Headboard, Art (2 Pairs, Support 30 lbs) - Amazon.com
Orange Aluminum 1-1/2" Z-Clips 625, Mill Finish with Holes - Interlocking French Cleats - Rectangular Metal Mounting Brackets for Hanging Pictures, Mirrors, Panels (Pack of 20) - Amazon.com
Z-Clips, Aluminum, Mill finish - in the Häfele America Shop