Let's start with the description from Luka, our founder:

"Big Mamma will last a long time. It will always be there for your day & night sharpening sessions. Be careful, though; the dimensions and weight of this stone are so big that if you spend more time with big mamma than with your significant other and they throw the stone at you in a fit of jealousy, you will probably die."

1 stone. 1 restaurant. 1 solution for the knives of all its chefs.
Big Mamma is the restaurant stone your professional kitchen family needs to function and stay sharp. It's the trusty tool that will keep the knives going when the pace in the kitchen gets too crazy. It's the large constant in your professional kitchen that will outlive all your chefs (and their children, too). Keep this massive stone at the sharpening station of your restaurant so the knives of your busy chefs can get a quick fix at any time.

A sharpening stone from the renowned Japanese whetstone manufacturer King is an affordable choice for professional kitchens and true sharpening legends. If you ever run out of this stone, pour yourself some whiskey and lie down. You probably sharpened a gazillion knives and need some rest.

The #800 grit stone is perfect for meeting restaurant sharpness demands on the go. It's used for general sharpening and is suitable for Japanese and German kitchen knives, razors, and even carpentry tools (in short: Go crazy, mamma will handle it). This stone can serve as a starting stone to achieve good sharpness even on medium-quality knives.

King stones are not just pressed into the shape, but also "baked". This means less stone wear during sharpening (meaning they will last longer), but they do require slightly more experience and patience with knife sharpening, as due to this manufacturing process, King stones will generate less slurry than our standard SharpEdge stones.

Dimensions: 230 × 100 × 80 mm (9.1" x 3.9" x 3.2")
Weight: 3.4kg (7.5 lbs)