A high-quality router bit that can handle the toughest carving and engraving tasks on marble and other hard stones. It features a 6mm shank that fits standard collets or holders, and a 20mm cutting height that allows for deep cuts. It has a ball-shaped tip that is coated with diamond sand, which is a fine abrasive material that can cut through hard materials with ease and precision. It also has a brazed joint that connects the tip and the shank, which is made from a special alloy that creates a strong bond and prevents the tip from breaking off