Sugatsune 388 Series Folding Bracket

Does anyone have experience with the Sugatsune 388 Series Folding Bracket? http://www.sugatsune.com/products/ProductDetails.cfm?CATID=9&SUBCATID=4&PRODUCTID88
I was planning to use them for a 24"x24" flip-up table in the walk-in closet.
Could someone describe how this bracket's mechanism works? Are they easy to unlock or do they require significant force to release the lock?
Any advice would be appreciated! Thanks!
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