This is a 210x78x50 mm stone that weighs just over 3 pounds. It's useful for making stones for the EdgePro.
(The video demonstration uses the small version of this stone.)
I use a Jackfruit cleaver in this video for the first knife to be sharpened. I purchased this in a cleaver shop in Hong Kong near the CCK shop. A rather extreme shape, it is a recurved edge that comes to a point going straight down at the widest part of the spine - the end of the spine above the tip. Useful for coconuts and ripping into tough skinned fruits like Jackfruit and Durian. Works like a talon for ripping into things.
I also demonstrate and discuss how to use the edge of the stone for tight radius recurves as well as serrated edges. I demonstrate how the tip cuts by 'stabbing' a piece of paper.
Next I use a Tojiro honesuki - a knife used for dissecting chickens. Ground at a coarse edge angle, with the tip used for dissecting breasts off of the rib cage.
The stone soaks relatively quickly, dishes or wears slowly and produces a nice edge in a short amount of time. I demonstrate burr removal using a stone and how to sharpen the back side of the knife without scratching the blade up. Slice cuts well. Push cutting is adequate, primarily because this is a thick knife for its size.