The Spring Bolt is a revolutionary means of attachment in the stair and railing industry. It is fully concealed, and takes far less time to install compared to all existing hardware. These facts mean a substantial savings to your company. The fact that the user does not have to be an accomplished journeyman to achieve a clean looking result. Spring Bolt saves the amount of time you would need help to little or none, therefore, saving on your labor cost. There are no unsightly wood plugs to explain away to your customers. There is no time involved to trey to match a plug for grains and colors, or any glue from the plug to clean. Make the wood plugs part of your past. As the Spring Bolt is twisted together the joint is placed in a constant clamping pressure action while the glue sets and cures. If the joint has been interrupted while the glue is setting the joint will clamp itself back together. In this event with other bolts, you would have to remove and destroy the wood plug, tighten the nut, install and blend a new plug. Once the springs have been screwed in place the joint can be twisted together without glue, to check the angle cuts of the joint and blending of profiles, if needed. To change the angle of the cut, unscrew the Spring Bolt back into the hole and twist the joint back together. This takes less than 30 seconds. Once you approve of the joint fitting, pieces can be pencil marked, unscrewed, and sent to the field for installation. The tools needed to install the Spring Bolt are: a wood paddle bit, a screw driver and a drill. Spring Bolt allows a newel post to be installed in less than 5 minutes. It is not required to have supports to hold your post in place while the epoxy sets. This attachment is COMPLETELY CONCEALED. Dry fitting in the shop instead of the field reduces the skill level required to install. This may increase the number of people available to get the job completed. Reduce field punch out time, by dry fitting in the shop.