drill a hole through a metal lid and fasten the knob mechanically with its original screw.
This can create a strong attachment, but drilling thin metal introduces sharp edges and requires appropriate tools and protective equipment.
For a simple beginner project, adhesive is often easier.
Step 13: Clean the Jars One Final Time
Before assembling everything, wipe the outside and inside of the jars so they are free of fingerprints and dust.
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Make sure the glass is completely dry.
