Includes (10) 3 1/2" x 5/16" rail bolt, (10) shoulder nut, (10) plastic curved washer, and (10) 1 inch Tapered Wood Plug. These rail bolt kits are the traditional and common method for attaching staircase handrails to handrail, fitting, newels, wall rosettes, walls, or fittings to fittings. They create a strong joint and eliminates unsightly screws or nail holes. The tapered plugs are face grain and slightly over 1" so that they will fit snuggly into a 1" hole. Also known as a handrail connecting bolt, handrail fastener, handrail to newel post bolt, or handrail to a newel post fastener. Stair Handrail Bolt Kit - Includes (10) Rail Bolts (3 1/2" x 5/16"), (10) shoulder nuts, (10) Plastic Curved Washers, and (10) 1" Paint Grade Tapered Hardwood Plugs.