Picture of Doyle Shamrock Industries building.

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In business since 1975, Doyle Shamrock Industries is your one-stop-shop for plastic injection molded parts. We can develop your idea, or take your part design all the way to production at our facility.

  • Design and Manufacture of Plastic Parts
  • Design and Build Plastic Injection Molds
  • Injection Molding Services
  • Precision CNC Machining
  • EDM Machining Services
  • Certified Quality: ISO/TS 16949:2016

Featured Products

Examples of different battery vent caps that we manufacture.

Battery Vent Caps

Examples of consumer products that we manufacture.

Consumer Products

Battery Box

Battery Box