Master Tool & Mold

What Master Tool & Mold does

Master Tool & Mold Inc is a privately held precision tooling manufacturer founded in 1972 and headquartered in a single facility at 765 11th Ave, Grafton, Wisconsin. The company designs and builds custom plastic injection molds and die cast dies for aluminum, zinc, and magnesium applications, and provides in-house tooling repair and maintenance. Its operations rest on a conventional CNC toolroom — OKK vertical CNC machining centers (up to 20,000 RPM), Sodick AD-55L EDM (sinker and wire), CNC lathes, surface grinders, and overhead crane capacity — supported by CAD/CAM software with Moldflow analysis capability. Published tolerance capability reaches +/-.00025", and the firm supports multi-cavity, hot/cold runner, multi-shot, family, stack, unscrewing, and insert/overmolding mold configurations.

The business sells exclusively on a direct, project-based quote model: customers reach the company through a "Request a Quote" web form or by phone at (262) 377-8030, and pricing is determined per project based on complexity, materials, tolerances, and lead time. Revenue is generated through one-time custom mold and die fabrication projects (plastic injection molds and die cast dies) and through recurring Repair & Maintenance services such as weld repair, spotting, cavity refinishing, ejector/slide repair, and preventive maintenance. The firm serves eight industry verticals — Medical, Automotive (primary), Aerospace, Packaging, Lawn & Garden, Recreational Products, Consumer Goods, and Communications — with a stated Midwest regional focus. Demand generation relies on website lead capture, direct phone sales, and industry reputation/referral rather than paid digital marketing.

The owner, Jim Sperber, operates the company as a closely held independent business with no disclosed parent company, subsidiaries, institutional investors, external funding, M&A activity, or public listing. The workforce is described as a core team of experienced moldmakers and machinists; no headcount figure is disclosed. Certifications, patents, partnerships, named customers, and revenue are not publicly reported, and the company holds American Mold Builders Association (AMBA) membership.

Name

Master Tool & Mold

Legal name

Master Tool & Mold Inc

Website

https://mastertoolandmold.com

Company type

Private

Founded year

1972

Operating status

Operating

Headcount range

11–50 employees

Short description

Master Tool & Mold Inc is a privately held Wisconsin precision toolroom founded in 1972 that designs and builds custom plastic injection molds, aluminum/zinc/magnesium die cast dies, and tooling repair services for manufacturers across eight industry verticals.

Ownership category

akta.pro rank

Headquarters

HQ city

Grafton

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Infrastructure, Technology or R&D, Supply Chain, Operations, Marketing or Sales

Revenue model

1. Custom Plastic Injection Molds: Design, engineering, and build of custom precision plastic injection molds. Revenue generated from new mold fabrication projects tailored to customer specifications including hot/cold runner systems, multi-cavity tools, and complex mold configurations.
2. Die Cast Dies: Design and manufacture of custom die cast dies for aluminum, zinc, and magnesium casting applications. Revenue from new die fabrication including unit dies and complete die sets.
3. Tooling Repair & Maintenance: In-house repair services including weld repairs, spotting, cavity refinishing, component replacement, and preventive maintenance. Generates recurring revenue from existing customer tooling maintenance and emergency repairs.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Master Tool & Mold designs and builds custom plastic injection molds and die cast dies for manufacturers, supporting tight-tolerance production of complex parts across plastics (hot/cold runner, multi-cavity, multi-shot, family, stack, and unscrewing molds) and metal casting (aluminum, zinc, magnesium). The company also provides in-house repair, revision, and preventive maintenance services using micro/laser welding, EDM rework, and precision grinding to minimize customer downtime.

Product overview

Master Tool & Mold is a precision tooling manufacturer offering three core offerings: Plastic Injection Molds (custom-designed and built production-ready injection molds supporting hot/cold runners, multi-cavity, multi-shot, family, stack, and unscrewing configurations), Die Cast Dies (high-precision tooling for aluminum, zinc, and magnesium casting with multi-slide designs and custom configurations), and Repair & Maintenance services (fast-turnaround repairs, weld services, and preventive maintenance using Micro & Laser welding, precision grinding, and CNC/EDM rework). Founded in 1972, they serve medical, automotive, aerospace, packaging, lawn & garden, recreational products, consumer goods, and communications industries.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• Precision tolerances down to +/-.00025" achievable
• +1 more outcomes

Segments8 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators3 records

Recent moves5 records

Expansion highlights3 records

Others

• Progressive Components: Supplier of standard mold components (ejector pins, date stamps, lifters) and custom die cast products. A tooling ecosystem enabler adjacent to Master Tool & Mold's mold-building business.

Direct peers

• Stueken: US-based precision tooling and deep-drawn metal components manufacturer. Comparable as a multi-decade precision tooling shop serving demanding industrial customers with tight-tolerance work.
• MSI Mold Builders: US precision injection mold builder specializing in multi-cavity, hot runner, and tight-tolerance tools. Direct peer in scale, capabilities, and customer base.
• RCO Engineering: Michigan-based precision plastic injection mold builder and molder serving automotive and consumer goods. Closely comparable in scale, geography, and customer verticals to Master Tool & Mold.
• Diecraft: Custom die cast die manufacturer producing aluminum and zinc tooling for industrial applications. Direct peer in Master Tool & Mold's die cast die product line.
• Mold Craft Inc. US precision injection mold builder with multi-cavity and tight-tolerance capabilities serving medical, packaging, and consumer goods. Closely aligned in customer verticals and tool complexity.
• Crescent Industries: Pennsylvania-based custom injection molder with in-house mold design and build capabilities. Comparable vertically integrated precision tooling and molding operation.
• True Precision Technologies: Custom precision injection mold and die cast tooling manufacturer serving automotive and industrial OEMs. Comparable as a multi-decade US job shop with similar capability profile.

Broad incumbents

• Husky Injection Molding Systems: Global leader in injection molding equipment, hot runners, and mold technology. While much larger and more diversified, Husky competes in the high-end injection mold and tooling space that Master Tool & Mold serves.
• DME Company: Major supplier of mold components, hot runner systems, and tooling solutions to plastic injection molders and mold builders. Comparable because it serves the same mold-building ecosystem Master Tool & Mold operates in.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/MasterToolandMoldInc

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Master Tool & Mold