With Spax 3.5 x 45 mm full-thread chipboard screws, you create strong and neat timber joints for furniture making and interior fitting. Thanks to the countersunk multi head, the screw mills directly into wood without separate pre-countersinking, giving you a smooth, flush finish without splintering. The Spax tip reduces wood splitting and eliminates the need for pre-drilling in most softwoods. a secure PZ2 Pozidriv drive delivers smooth torque transfer and prevents bit slippage during driving. Furthermore, the Wirox coating provides significantly higher corrosion resistance than standard zinc plating for all your indoor fastening jobs.