Rapid and easy to use they are a must have for the professional rescuer. They can be used for any cribbing application during rescue operations and have several advantages over wood as means of cribbing a structure. The unique interlocking and stacking design makes create any stabilization structure needed fast! With the ability to withstand loads up to 60 US tons, you are able to crib everything you're working on. Get more control over a situation and more safety for victim and rescuer.