What is a common tool for cutting through insulated wires?

Diagonal cutters are specifically designed for cutting wire and are particularly effective with insulated wires. Their design includes sharp, angled blades that provide precision and leverage, allowing for clean cuts without damaging the insulation. This makes them an essential tool for linemen, as they often deal with various types of insulated conductors in their work.

In contrast, while combination pliers can also cut wire, they are more versatile and may not provide the same level of precision and ease when cutting insulated wire compared to diagonal cutters. Pry bars are intended for prying and lifting, not cutting, and pipe wrenches are used for gripping and turning pipes, making them unsuitable for any wire cutting tasks.