Hi Dave, we sell a fastener called the Rail to Rail Spring Bolt (SKU# 622-599) that is very easy to use, and provides ample strength and support when joining two pieces of rail together, or when attaching handrail fittings. Each store that sells stair parts should have these fasteners, or they can be ordered on the Home Depot website and shipped to your home. If you have questions, we'll reply as quickly as we can. Thank you.