I have never used sorters before putting jigsaw puzzles together but decided to try. I'm glad I did! I found them quite useful for the 1000-3000 piece puzzles I usually make. I usually have key target colors that I first sort, collect, and then move on to the next target area. These trays are light enough when "filled" that they can be easily moved to the area of interest as you work. I love the bright colors and the stackability. I just need one more set to add to my "toolbox" but unfortunately they are currently unavailable (December 2017).
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