All craftsmen have a special relationship with his tools of the trade. Just like how a sushi master-chef treasures his knives, a tailor's shears is his indispensable tool.
My father's pair of black shears is over 20 years old, and the golden one around 5 years old. It had served him well over the years, but after cutting through hundreds of yards of fabric, it had become blunt at the edges. Being a handyman, he always sharpens the shears against a sharpening stone himself.
Above, you can see that the golden shears' blade runs straight out from the hinge. Below, the black shears' blade dips and curves downwards, due to repeated sharpening over the years. It is amazing how much of the blade had been filed off!