HANDS DOWN the best investment EVER! I can't even imagine how much kief I used to lose when breaking up flower over a tray or anything besides this RYOT collection box. Nice strong magnets keep both sides on and it comes with a card to scrape the kief up. I have finally been able to press my own hash coins. Let's get it straight... I don't sift my flower in this thing... I simply break apart my flower, pack bowls, roll joints in it and over time I have quite a bit of kief collected. My screen is still holding strong and I bought this in 2016. Will buy another, without question, if my screen ever does go bad.