With the Spax chipboard screw 3.5 x 15 mm, you secure thin boards, hinges, and hardware to chipboard, MDF, or softwood quickly and firmly. The t-star plus T20 drive recess provides a secure bit grip without cam-out, giving you full control and optimal power transmission while driving. Its countersunk multi-head sinks flush into timber without splitting fibers and stops clean on metal fittings. In addition, the durable wirox coating delivers significantly higher corrosion protection than standard zinc plating for indoor applications. You achieve neat, flush, and reliable wood connections on every interior fitting project.