With the Spax chipboard screw, you achieve strong and lasting wood joints for outdoor projects and damp indoor spaces. Constructed from A2 stainless steel, it reliably protects your pergolas, garden structures, and furniture from weather exposure and rust. The t-star plus T15 drive delivers dependable torque transfer, preventing bit cam-out and protecting the screw head during installation. Its countersunk multi-head mills cleanly into the material for a completely flush finish without separate pre-countersinking. In addition, the full thread design ensures maximum pull-out strength across the entire length in materials like chipboard, MDF, plywood, and solid wood. You work faster, with complete control and a neat result every time.