With these Spax chipboard screws, you create strong and reliable timber joints for outdoor projects and humid environments. Made from A2 stainless steel, they provide dependable protection against weather exposure and rust. The t-star plus T15 drive delivers an exact bit fit and optimal torque transfer, preventing slippage while you work. Thanks to the countersunk multi head, each fastener sits neatly flush with the timber surface. The 4CUT point minimises wood splitting and removes the need to pre-drill in softwood, while the 3.5 x 35 mm full thread ensures high pull-out resistance for a solid hold.