Alloy chisels are chisels made of alloy, typically used for carving or cutting hard materials. The cutting edges of alloy chisels are sharper and more durable because they are made from a mixture of various metals, such as tungsten, cobalt, and chromium. This makes them stronger and more wear-resistant than ordinary steel chisels. Alloy chisels are often used for carving hard materials like stone, metal, and wood because they can better maintain the sharpness and durability of their cutting edges.