Check out #8! Thomas has been a long time supporter of MAC Knife.
"There have been many cutlery suitors who tried to attract Keller's attention, but he was never persuaded. 'About a year ago, Harold gave me a MAC knife to test in the kitchen and I have been using it ever since.'
... The thin blade also allows for a straighter cut because there is less 'wedging' within the food when the blade passes through it.'"
http://www.elledecor.com/life-culture/food-drink/g2764/12-things-thomas-keller-cant-live-without/