QUALITY MATERIAL -These swivel hand rail brackets are made of steel, fine surface treatment, more wear-resistant, long service life. Easy adjustability and tightening.EASY TO INSTALLATION - Railing brackets can be firmly installed on the wall with a drill and screwdriver. Suitable for drywall, wooden wall, concrete wall and stone wall.VERSATILE -This hand rail bracket is used for securing handrails on stair cases. perfect for installation in stairs, stair wells, steps, entrances, offices, bedrooms, living rooms and kitchens.Stair cases Hand rail Brackets Overall Size: 2.75" x 2.45" x 2.3" (70mmx62mmx58mm). Base Size: 2.3" x 1.5" (58mmx38mm). WHAT YOU WILL GET - 4pcs hand rail brackets, 8pcs short screws, 12pcs long screws, 12pcs expansion tubes.