Twisted in Wire Brushes

In Twisted Wire Brushes, the filament material is twisted between two wires or four wire.

And there have below 3 constructions:

1. Single-Stem Single-Spiral – Filaments are twisted between two stem wires with a single layer of filament.
2. Double-Stem Single-Spiral – Filaments are twisted between four stem wires with two stem wires on each side. So this results in a brush with a much stronger base and potentially greater filament density.
3. Double-Stem Double-Spiral – Filaments are twisted between four stem wires with two layers of bristles. Each layer is perpendicular to the other with a single stem wire in each quadrant. So this results in a brush with the highest filament density and highest strength.