A jig you can fashion n your shop that allows you to make pocket holes without a commercial jig and special hardware.
How to Use a Pocket Hole Jig (& Beginner Pitfalls to Avoid)
Pocket-hole pointers
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Sieben einfache Holzverbindungen mit Pocket Holes
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DIY Pocket Hole Jig
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Pocket Hole Jig, Woodworking Project
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joinery - Substitute for Pocket Hole Jig? - Woodworking Stack Exchange
How to Use a Kreg Jig: 11 Steps (with Pictures) - wikiHow