Diamond Tool & Die

Diamond Tool and Die, Inc. is a renowned machine shop that has been serving the industry since 1967. Founded by Donald Gene Holt, the company began as a one-man job shop in Donald's home garage. Over the years, we have grown to become a leading provider of precision CNC and manual machining services, wire EDM machining, and repairs. Our commitment to quality, efficiency, and customer satisfaction has made us a trusted partner for numerous clients across various industries.

Our History

In 1968, Diamond Tool and Die incorporated and moved into its new home at 508 29th Avenue, Oakland, CA. Initially, the facility was a 2,500 square foot wooden building. During the early 1970s, we played a significant role in designing and manufacturing artificial kidney dialysis machines and support equipment. Donald Holt also designed and patented his revolutionary quick change tooling system known as Inmotion, which was manufactured and sold worldwide.

Throughout the 1970s and 1980s, we continued to expand our product line and services. In 1976, we introduced a gas purifying product line known as LabClear and began a tooling distributing company known as The Tool Crib. By the early 1980s, we had built our first of six buildings and grown to fifteen employees. Later, in the late 1980s, we merged with another machine shop known as Apsco Manufacturing and introduced a moisture trap product line known as OxiClear.

In 1993, Donald Holt's son, Darrell Holt, and Dan Welter became President and Vice President of the Corporation, respectively. Today, we are housed in a 30,000 square foot facility with over thirty-five employees/owners and more than 75 machines on the floor, including CNC/manual Mills & Lathes; EDMs, and CMMs. We have a full-time Inspector and Chemical Engineer on site, as well as in-house Accounting, Programming, Job Costing, Quoting, Material Tracking, and Shipping and Receiving Departments.

Our Services

At Diamond Tool and Die, we offer a broad range of services and can take your project from prototype to production. We specialize in precision CNC and manual machining of all metals and plastics, wire EDM machining, and repairs. Our team of skilled professionals is dedicated to providing punctual service, excellent quality, fine craftsmanship, efficient prices, and a sincere interest in your objectives.

Our Facilities

Our 30,000 square foot facility has three temperature-controlled CMM (Zeiss) inspection rooms and an enclosed de-burring & clean packaging room. As a full-service machine shop, we can assist with outside services in addition to our in-house machining of metals & plastics, finishing, and inspection services. We run day, night, and weekend shifts, so that we can assist with rush jobs and emergency services.

Our Employees

At Diamond Tool and Die, we realize that our employees are our most valuable resource. On average, our employees have been with us for 26 years. Collectively, our employees have over 700 years in the manufacturing industry, giving DTD and its customers the benefit of their vast expertise and practical experience.

Safety and Community Involvement

Diamond Tool and Die has a Safety Program with a Proven Record. All employees are responsible for complying with DTD's Injury and Illness Prevention Program, safety rules, and policies. We are also committed to contributing to the needs of many organizations and events in our Bay Area community, including the Cub Scouts, Boy & Girl Scouts, Special Olympics, Alameda Elks Club, Meals on Wheels, Susan G. Komen For The Cure, Boys & Girls Clubs, Local Little League, Local Girls Softball, and Local Boys & Girls High School Football, Baseball, Basketball & Volleyball.

Contact Us

For more information about our services, facilities, or to request a quote, please feel free to contact us at:

Phone: 510-534-7050

Fax: 510-534-0454

Email: rfq@dtdjobshop.com

Office Hours: 7:30 am - 4 pm Monday-Friday