What is the advantage of using brass liners in a bench vise?

Using brass liners in a bench vise primarily offers the advantage of reduced workpiece damage. Brass is a softer metal compared to steel, which helps in providing a gentler grip on the workpieces being clamped. When a workpiece is held in a vise with brass liners, the liners provide a surface that can conform slightly to the shape of the workpiece, reducing the risk of marring or gouging the surface. This is particularly beneficial for delicate or finished surfaces that could be scratched or dented by harder materials.

In addition to this primary advantage, brass is less likely to distort or deform under pressure, further aiding in the protection of the workpiece. The choice of brass as a liner material balances the need for a secure grip while minimizing the potential for damage, making it an excellent option in applications where the integrity of the workpiece is crucial.