This is a necklace by Tom Sachs, a contemporary artist based in New York. It features a 25-cent coin, a symbol of capital, welded to a screwdriver, a symbol of labor. The screwdriver head is the most widely used Phillips head bit. This is a Quarter Screw by Tom Sachs, who held a large-scale solo exhibition at the Opera City. As a limited-edition, handmade art piece by Tom Sachs, this is likely to be a rare item. Quarter Screw Tea Ceremony Tea Ceremony Quarter Screw Pendant Top Used by Kunichi Nomura. 09823