IT DOES NOT REQUIRE HOLES. IT IS COMFORTABLE TO USE. IT IS SUITABLE FOR EVERY EAR BECAUSE IT IS ADJUSTABLE. THE PACKAGE CONTENT IS 1 PIECE. IT IS RHODIUM PLATED ON COPPER. IT IS HIGHLY RESISTANT AGAINST TRANSCRATING AND SCRATCHING. PROTECTION PACKAGING IN REQUIREMENT OF HYGIENE AND HEALTH RULES RETURN OR EXCHANGE IS NOT POSSIBLE FOR SOLD OUT PRODUCTS.