Multi- Compatibility: Compatible with drywall, wood, concrete, and stone walls, these wall mounted brackets suit staircases, corridors, offices, and spaces. The sleek black finish blends effortlessly with various interior designs. Enhanced Stability with Three-Hole Base: The three-hole base ensures superior stability compared to traditional two-hole stair railing brackets, offering a secure wall attachment suitable for frequently used spaces. Heavy Duty Carbon Steel: Made from premium carbon steel, these adjustable handrail brackets provide exceptional strength, making them suitable for long-term use in any setting. Adjustable Design: These swivel handrail brackets feature adjustable angles, fitting various staircases, handrails, and ramps. Ideal for residential and commercial projects, they provide flexible solutions for diverse railing needs. Simple Installation: Each 4-pack includes pre-drilled holes and screws for quick and easy installation. The well-thought-out design allows for easy setup, saving time and effort on any project., Manufacturer: CTRLZS