The roller unit is a split roller unit consisting of two hot galvanised chassis fitted with rollers with a durable, long-lasting splatter welded roller surface for high friction co-efficiency. The roller units are extra wide to accommodate vans, small trucks and camping trailers.
The brake force is measured with strain gauge transducers. The roller units are fitted with sensors detecting the presence of a wheel set on the rollers. This system ensures that the rollers will not start accidentally. A speed sensor measures the wheel speed. The point of wheel lock can be set at 4 different settings.