Broekema is the only manufacturer of sieve belts that is able to supply hardened rivet rods. These rivet rods are made of high-quality spring steel, and have an optimum yield point and tensile strength. Broekema rivet rods, which are patented, have a long life span and are stronger than any competitor. This means they give a better yield, because they allow harvesting machines to move more quickly, for example, or because more soil goes onto the soil separation conveyors. There are fewer fractures, so Broekema belts ultimately last longer. This is why machine builders involved with demanding applications, such as harvesting beet, also use sieve belts made by Broekema.