Atrapa-reinas/marcador de una mano

I had the opportunity to use it immediately and must admit I am disappointed. While the yellow upper cover is friction fit and will not slide without manual effort, the lower chamber will free fall on the unit I have. That means I was unable to capture the queen without maintaining a hand on the lower chamber slide. Once the queen was in chamber, a slip up meant the sponge would free fall and with possible injury requiring a to hand operation. Not what I anticipated. I would have given one star except marking was easy once the queen was captured. Enough said. I would pass if I knew this to begin with.

great tool in the Bee yard

I use this instead of a queen clip in my hives. It's much safer for the queen, and very easy to use.

Good quality and design, but I have not had the opportunity to use it yet.

I have 2 NUCS coming this Friday, so I have not used it yet. They will be with unmarked queens so it should be interesting.