The New Westbury C10 TBK Stair Mount 4PACK W/SCREWS TBK Kit in Black is a set of four aluminum stair mounts that come with screws for easy installation. Designed by Westbury, this model (170157TBK) is specifically made for staircase kits, providing a secure and stylish way to attach railings to stairs. The sleek black color adds a modern touch to any home improvement project involving stairs and railings.