Sturdy and Durable: The stair railing bracket are made of zinc alloy with smooth and rounded surface, waterproof, rustproof and corrosion-resistant Weight Capacity: Each handrail brackets for indoor stairs can support up to 200 pounds Easy to Install: Stair handrail Bracket installation only requires measuring, drilling and securing the stair railing to a wall, stud or other structurally sound surface. (Do not over tighten screws or they may break) Application Scenario: Stair banister brackets is suitable for home decoration, stair railings, mall fence handrails, corridors, building handrails Attention: Maximum distance between brackets not to exceed 48 in 3" Stair Handrail Bracket,6 Pack Hand Rail Brackets for Stairs, Matte Black Stair Railing Bracket, Banister Brackets for Indoor Stairs, HOME MASTER HARDWARE