With Spax s chipboard screws, you create strong and dependable timber joints for furniture assembly, interior fitting, and indoor construction tasks. The specialized countersunk multi-head sinks flush into solid wood, MDF, and chipboard without splitting the surface. Thanks to the full-thread design, you achieve maximum pull-out strength and tensile rigidity across the entire screw length. The reliable PZ2 Pozidriv drive provides efficient torque transfer to eliminate bit slippage and cam-out while driving. Supplied in a pack of 500 yellow-passivated steel screws measuring 4 x 55 mm, this set gives you the holding power and control required for clean indoor installations.