Made from premium, durable steel for heavy-duty and longer use Zinc-plated for higher rust and corrosion resistance in any condition Standard sized hexagonal nuts for use in the majority of applications The locking hex nuts can be used for screwing on to bolts, as well as threaded rods and cap screws Ideal for folding beds, wardrobes, miners, engines, textile machinery, workshops and so on Suki products are quality approved and to ensure consistently high standards, we test all our products in our own laboratory and also work closely with an independent testing institute.  Rest assured that our products are extremely durable and meet the high standards expected by our customers.