Features A cavity fixing that is ideal for hanging radiators, brackets, hand rails and shelving units. When installing multiple anchors a TIMco Setting Tool is recommended for a fast and efficient way of installation. Specification Substrates - Drywall, Wood Panel Finish - Zinc Pack Qty - 100 Pack Type - Box Anchor L (mm) - 38 Screw L (mm) - 45 Grip Board (mm) - 8 - 16 MFT (mm) - 8 Screw Size (mm) - M4 x 38 Thread Ø (mm) - M4 Fixture Hole Size Ø (mm) - 4 Corrosion Rating (1-5) - 1 - Clean, dry & low humidity environments Thread Type - Metric Recess Type - Combi Point Type - B Point Head Type - Pan Standard Equipment 1x TIMco M4 x 38mm Metal Cavity Anchors Box Of 100