Elevate your railing design with the COS-SK898-HMB Single Knuckle Spindle Bar. Featuring a sleek square profile and matte black iron finish, this spindle brings timeless appeal to interior staircases or balcony systems. The integrated single knuckle detail offers a subtle decorative accent while maintaining structural durability. Ideal for both modern and classic spaces, it’s designed to fit standard 1/2″ iron baluster systems and installs easily for professionals and DIYers alike.