bottom twistlock

...The CONTECH® dovetail or U-frame twistlock B-46 is a point load bottom twistlock used in combination with a dovetail or U-frame FR-31, FR-31B, FR-31Q (elongated), double FR-32/A or a FR-32B/A of 45 degrees to secure the corner castings of containers on board a vessel. The twistlock is to be used when the sliding direction of the dovetail foundation is rotated 90° to the longitudinal direction of the container.

...Telescopic plastic packaging tubes with Twistlock closure and adjustable length High security thanks to the "TwistLock" bayonet closure system, which opens and closes with minimal effort. The feet and integrated ribs at the bottom provide excellent cushion-like protection combined with increased rigidity achieved through the side grooves. Adjustable length with a "ratchet" system.