The Masters of Knife Sharpening

The Ambrosi Family and Master Grinding

Guido and his son Italo "Bill" Ambrosi were born in Carisolo in the Val Rendena, an area in the province of Trento, Italy. There, they learned the knife sharpening skills of the Moleta. Along with many other Italians, the family moved to America. Once here, they quickly began working as knife grinders in the New York City area. Eventually, Bill moved his family to New Jersey and built what has become Master Grinding Service, Inc.

Bill continued to grow the business with his own son Raymond. Eventually his cousin Emilio joined with them in 1976, followed a few years later by Bill's youngest son, John. The current owners continue to be Raymond, Emilio, and John Ambrosi. John's wife, Renee handles our bookkeeping and Emilio's wife, Rita takes care of our sales and marketing. And while he's not technically family, Angelo Dalbon feels like family and has been a key employee for longer than we can remember -- probably longer than he can.

Speaking of our team, they don't just have years of experience, they have decades. More than having a technical proficiency on the machines and stones, our staff has the "touch" for giving knives the best blade edge possible. And, while we're pretty protective of our special methods, they really can't be replicated even if we told you. It's as much an art as a skill.

In addition to our sharpening personnel, our delivery/sales people are equally important in providing supreme service to our customers. Our drivers will be happy to assist you with any questions you may have regarding the knives provided to your establishment.

We truly love what we do. We take care of each other like families should and work hard because we enjoy what we do. The history of our profession is rich and proud, and we love the rapport with other grinders here in the Northeast and across the USA. So, whether it's reminiscing about the history of the Moleta or looking forward to dynamic product development or revolutionary web services, the Ambrosi grinding traditions are here to stay.

The History of Knife Sharpening. Learn more

First Jersey, Next the World

We're dedicated to our local customers here in New Jersey and the Greater New York area. Hundreds of restaurants, pizza shops, cafeterias, delis, supermarkets, meat cutters and plenty of other food service professionals know they can always depend on Master Grinding. Plus, we continue to have individuals stop by the shop to get their personal knives sharpened or check out our great cutlery and restaurant supplies.

While we love our local clients, we continue to expand our services to meet the needs of businesses throughout America and over seas. Our new web services are just some of the ways we are meeting the needs of clients near and far.


We've got other customers from coast to coast and around the globe. We developed a line of professional knives called KnifePro®. These knives are used for our Knife Exchange Service and are also sold in our retail shop. Plus, commercial kitchens all over the country are using KnifePro knives since other professional knife sharpening services have enthusiastically embraced the KnifePro® brand as their premier choice. Now, with the introduction of, anyone can browse and order KnifePro knives (wholesale and retail) at anytime.

Learn more


We're taking our knife sharpening services beyond our New Jersey/Greater New York service area with our KnifeSpa service. Now, anyone can benefit from our decades of knife sharpening experience by ordering the service online.

Learn more


Along with our own line of knives, we've added a line of knife blade protectors—BladePods®. These sleek sheaths, lined with velvet, are perfect for storing or transporting knives safely or shipping them to us for sharpening. You can get BladePod accessories in our shop or online at or

Learn more Old Photographs