HIGH-QUALITY MATERIALS: Made of high-quality stainless steel, these sliding door rollers are resistant to rust, deformation, wear, and corrosion. They are ideal for long-term use. 360° SWIVEL: The sliding door roller swivels 360°, expanding its application range. It is suitable for doors, windows, single or multiple sliding doors, folding doors, etc. SMOOTH SLIDING: The sliding door rollers feature a smooth surface that produces no scratches or noise, and its 4 double rollers ensure good balance. EASY INSTALLATION: Our sliding door rollers come with removable mounting hardware for quick installation and disassembly. WIDE APPLICATIONS: These sliding door rollers are widely used for many types of sliding doors: single or multiple doors, wooden doors, bifold doors, etc.