Spectre by Forgefix incorporates a long list of advanced screw features, often only found in premium screws, into what we've named advanced multi-purpose woodscrews. Head: Countersunk pozidrive compatible recessed. Finish: Zinc Yellow Passivated. Advanced multi-purpose design. Anti corrosion coating. Reamer to prevent jacking. Sawtooth to prevent splitting. Fully threaded up to 50mm. Quick start type 17 slash point. Surface hardened. Synthetic lubrication. CE approved for use in load-bearing timber construction.