Idiot-Proof Railings. The Stair Simple Axxys Railing System uses unique pivoting connectors to join the stair rail to the newel post and the balusters to the rail, eliminating any need for complex miter cuts. These parts are available individually or as part of a kit that includes everything needed to complete an 8-foot railing section. Rails are predrilled; installing one section takes about an hour, says the maker. The kit costs $215. BW Creative Wood Industries, 800/667-8247, stairsimple.com.