Most airlines do not allow any sharp objects metallic or other. Since ceramic blades are not really durable for attacking someone (TORSION) they are not that dangerous but the full body scans will pick up even a single tissue in back pocket of jeans,. Happened to me! I have flown with a micro knife in wallet by mistake and gone through the metal detector.
I will be MAILING as first class mail in a standard business envelope. Even three of the micro knives are within mail regulations and no metal to kick off any sorting mechanism. SO no customs forms will be fixed to the shipment and no duties levied. I have sent a few test shipments without any problem.
The molding was done in two parts then electosonic welding together to give the proper tension on blade to hold it inside when not in use. The little "dedent" arm on top will provide a bit extra protection to keep blade inside the channel BUT it is normally not required and can be removed without any decrease in tension on the blade. OF course if used extensively the blade could "wear in" a bit and if it becomes too loose, simply put a piece of tape in the middle of the blade to increase tension. The very center of the blade is seldom exposed during cutting but keeping tape above the 'edge grind" would permit full exposure and use when cutting.
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