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[Premium Steel Material] The drywall anchor is made of high quality steel material, which has a wide application. The drywall anchor will not crack under pressure, providing long-lasting stability. [What You Get] The package includes 12/20 Sets of 1/4inch-20 anchors and matching 1/4inchx2-1/2inch bolts, easy to install on a variety of walls and structures. [Easy to Install] This drywall anchor set is used to protect your walls from damage. The kit includes pre-installed anchors and bolts, ideal for any installation project. It is easy to install and disassemble. [Scope of Application] This heavy-duty drywall anchor set can be installed behind hollow materials 3/8inch to 3-5/8inch thick, including plasterboard, drywall and concrete block. It provides a secure hold within the mounting material and ideal for mounting cabinets, shelves, picture frames, lighting fixtures and more.