For fastening insulation and membrane to steel and timber decking in combination with:Global R tube system.Pressure plates.FeaturesButtress thread ensures excellent pull-out resistance.Unique Enduroguard 15 coating for excellent corrosion resistance.Torx 25 recess head style.Drillpoint designed for fast, accurate penetration of steel deck up to 2.0mm.Recommended Minimum Fastener PenetrationSteel decking 0.7mm to 2.0mm thick 15mm through underside.Plywood decking 18mm minimum thickness 12mm through underside.Timber decking 25mm minimum thickness 12mm through underside.Timber joists or rails 35mm embedment.For timber deck applications a site pull-out test is recommended.