The 3005 Key Lock is a fully concealable newel post fastener that offers both functionality and aesthetics. This innovative fastener allows for a seamless and clean installation of newel posts, with no visible hardware. It provides a secure and reliable connection, ensuring the stability and strength of your staircase. The 3005 Key Lock is designed to be easily concealed within the newel post, allowing for a clean and professional finish. With this fully concealable newel post fastener, you can achieve a polished and flawless look for your staircase while maintaining the structural integrity of your railing system.