OwnMy 15PCS M4 x 20 Hollow Door Anchors and Screws Hollow Wall Anchors Hollow Metal Cavity Fixing Jack Nuts, Hollow Door Anchors Petal Nuts Expansion Nuts for Hollow Wall Metal Sheet Plastic Sheet

Package includes 15 Pieces M4 x 20 Hollow Door Anchors, the sufficient quantity will meet your using requirements, practical and convenient expansion screws are suitable for shallow hollow panels like doors and walls.
Overall dimension is 4mm x 20mm, applies to various base material, such as aluminium cladding sheet, iron sheet, hollow plastic sheet, thin metal plate, wall paperboard, concrete, wood, ceramics, cardboard an so on.
Made of high quality steel material, this set of expansion nuts is durable, sturdy, rust & corrosion resistant, not easy to deform or crack, has strong fixture & support capacity and not easy to fall off, will not damage soft plastics or thin sheet metal materials.
Easy to use, drill a hole and tap the anchor, attach the corresponding tool to the screw head and squeeze to expand the anchor, then remove the screw and place it through the fixture, tighten the screw and the sheet material in place to complete installation.
Designed for home, office, industry, craft, for fastening or hanging items on hollow doors / walls, widely used for hanging curtain rods, door hangers, metal frames, wall cabinets, wall panels, hollow plates, license plates, drying rack, floating shelves, container tags, artworks or more using needs.

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