Made from premium, durable steel for heavy-duty and longer use With high rust and corrosion resistance in any condition Knurled thread eases driving and maximizes holding power It can be used to secure even the latest MDF and chipboard materials Ribbed self-countersinking head to give a flush finish Industry standard crossed recessed head Fully threaded 4.5 cm for maximum holding power 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.