With Spax chipboard screws, you assemble timber structures quickly, neatly, and securely. Thanks to the partial thread, timber panels, battens, and furniture components are pulled tightly against the substructure, while the multi countersunk head mills cleanly and sits flush with the surface. The t-star plus T20 drive delivers optimal torque transmission and keeps the bit firmly seated without slipping. In addition, the zinc wirox coating provides reliable corrosion protection for all indoor timber applications. With this box of 1000 steel screws measuring 3.5 x 40 mm, you complete your interior joinery and furniture projects with total confidence.