Secure your outdoor timber projects and damp interior installations with Spax chipboard screws. Made from durable A2 stainless steel, these 3.5 x 30 mm screws deliver dependable protection against weather and corrosion. The t-star plus T15 drive ensures a firm bit grip to prevent cam-out and slippage, giving you full control and smooth driving. The countersunk multi head sinks flush into wood without surface damage and stops cleanly on metal fittings. Featuring a full thread design, each screw provides high pull-out resistance across its entire length for a firm, long-lasting hold.