I want those two small holes through both components rather than the one part shown. Two holes are in the little block however, it doesn't cut into the long slender part to create holes.
You can add features in Assemblies that remove material from components. Be sure to review all the options in the feature's Property Manager, especially the ones about selecting which components to affect with the feature, and also whether or not you want the feature to be reflected in the Part files, or to exist only in the Assembly.
How can I get an Assembly cut or Hole Wizard feature to show in my Part file? in the FAQs (Frequently Asked Questions) section of this forum has screenshots that may help.
See if Hole Series will do what you want.
2020 SOLIDWORKS Help - Creating a Hole Series
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