New and high quality1. Drill a hole to the recommended diameter.2. Tap the anchor into the hole until it is flush with the surface of the substrate.3. Attach the setting tool to the head of the screw.Squeeze the trigger to expand the anchor.(Small sizes may be set using a screwdriver)4. Remove the screw and place it through the fixture then back into the anchor. Tighten the screw until the fixture is fixed.Size:as photos showPackage includes:10pcs