Fangrui Product Details [excellent Design] The Special Card Slot Design Can Safely Lock The Tray To Prevent Tilting And Falling; The Connection Expansion Design Increases The Distance Between The Trays, Which Protects The Food From Squeezing Each Other Well, So That The Food Inside Can Be Better Preserved ;the Straight-edge Design Is The Good Versatile Way To Stack Pallets, Allowing Pallets Of Sizes And Types To Be Stacked Easily. [space Saver] Our Tray Stacker Allows Multiple Pallets To Be Stacked Together, Saving Storage Space In Kitchens, Refrigerators, And Cabinets Very Efficiently. With Them, You Can Stack Trays Vertically On Freezers, Refrigerators, Countertops, And Take Up Less Space. [hight Quality] Our Tray Stackers Are Made Of Premium Plastic, It Is Solid And , And Can Be Reused. Pallet Stacker Is Also Not Easy To Deform And Crack Under Low Temperatures. The Home Dryer Stacker Has No Edges And Its Very Safe To Use . [easy To Use] Easy To Use,tray Stackers Are Easy To And Put On.you Just Need To Connect Them Together L