Stylish, durable headphones made of shell casings .40 S&W. The final result can be seen on the website: Federal 40 Headphones
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Step 1: Cutting Shell Casings
Install .40 S&W shell casings in the drill and trim. Smooth the edges with sandpaper.
After cutting shell casings should be 12 mm.
Step 2: Drilling
Drill a hole of 2.7 mm.
Step 3: Polishing
Polish the shell casings with sandpaper grit 800.
Polish the shell casings with steel wool grit 000 or 0000.
Step 4: Installing Shell
Put on a wire: shell casing and shield wire.
On a wire tie the knot.
Step 5: Soldering
Solder the wire to the speaker. For best quality, use a mixture of tin and silver.
Step 6: Bonding
Degrease surfaces to be bonded.
Glue two portions and placed in a vise for 24 hours.