With these Spax chipboard screws, you create strong and flush timber joints for outdoor wooden structures. The 61 mm partial thread pulls wooden components tightly together, leaving no gaps between the timbers. Made from A2 stainless steel, these screws deliver reliable corrosion resistance against moisture and outdoor elements. The t-star plus T30 recess ensures optimal bit engagement and stable driving without cam-out. In addition, the countersunk multi-head sinks flush into the timber surface for a clean, secure, and professional finish.