Anyone who sharpens knives knows that water is half the job. The whetstone needs constant moisture, the slurry should be rinsed away regularly, and without proper access to water you end up going back and forth between the sink and the sharpening stone at an irritating pace. The solution is really obvious: work directly over the sink.
The sink bridge is an adjustable stainless steel bridge that spans the sink and holds the whetstone securely in place while you work. The tap is within reach. The slurry runs straight down. The worktop stays dry. It sounds simple because it is simple, and that is exactly what makes it such a good tool.
There is also a practical reason why fresh water matters beyond the obvious: when working on finer grits, old water can carry coarser abrasive particles from earlier stages, which compromises the result. With running water and direct drainage, that problem disappears.
The bridge is fixed against the inside of the sink with simple screws. The inner blocks are then adjusted to the width of the stone until it is held firmly without moving. Fits sinks 33 to 43 cm deep and stones 10.5 to 24.5 cm long. Can also be used on a flat surface as a regular whetstone holder.