Which type of saw is specifically designed to cut irregular shapes?

The sabre saw, commonly known as a jigsaw, is specifically designed to cut irregular shapes due to its unique characteristics. It features a straight, vertical blade that can move up and down, allowing for intricate and curved cuts in a variety of materials, including wood, metal, and plastic. This flexibility in movement enables users to create detailed patterns that would be challenging to achieve with other types of saws.

In contrast, a circular saw is primarily used for making straight cuts in lumber and sheet material and is not suited for intricate shapes. A table saw is excellent for precision cuts at various angles but is also limited to straight edges. Meanwhile, a handsaw can be used to make curves, but it requires more skill and is not as efficient as a jigsaw for cutting complex shapes. Thus, the design and function of the sabre saw/jigsaw make it the best tool for cutting irregular shapes.