Shaft or mandrel for jade carving

An item at Metropolitan Museum of Art

These steel drills with blunt points (zhuangding or dingzi in Chinese), flat heads (tuozi), or curving heads (wazi) are used for high relief carving, undercutting, and fine shaping of small jade works. The craftsman holds the jade in one hand against the drill, which is mounted on a spinning shaft. He or she rotates the shaft using foot treadles, while continuously applying abrasives, usually sand mixed with water, to the tip of the drill, which cuts the jade.

Asian Art

An exhibit at Metropolitan Museum of Art

The Met's collection of Asian art—more than 35,000 objects, ranging in date from the third millennium B.C. to the twenty-first century—is one of the largest and most comprehensive in the world. Each of the many civilizations of Asia is represented by outstanding works, providing an unrivaled experience of the artistic traditions of nearly half the world.

Metropolitan Museum of Art