What feature is used to identify different types of chisels?

The shape of the cutting edge is the key feature used to identify different types of chisels. Chisels are designed with specific cutting edges tailored for various applications, such as paring, chopping, or mortising. Different shapes, like straight, beveled, or angled edges, enable a chisel to perform effectively for particular tasks. For instance, a mortise chisel has a thicker, more robust edge that is ideal for cutting deep into wood, while a paring chisel features a thin edge designed for delicate work and fine shaping.

In contrast, while the color of the handle might distinguish brands or types of tools generally, it does not indicate the function of the chisel itself. The size of the chisel may provide information about the scale of the work it can perform, but size alone doesn't convey the specific purpose the chisel serves. The material used to make the chisel may impact durability and performance, but again, it does not specifically identify the type. Therefore, the cutting edge shape is the most critical characteristic in differentiating chisels based on their intended use.