The Cable Connection’s Ultra-tec line includes a variety of double-tensioner connections for cable rail systems. According to the company, all other retail cable kits have a single tensioner on one end and a non-tensioning fitting on the other, which is fine for straight runs and those with one right-angle turn (providing two posts are used at the corner). But by adding a second tensioner, a single cable run can go around two 90° corners. Versions are available for mounting on the inside or the outside of the posts, for both metal and wood posts. The Cable Connection, 800.851.2961, thecableconnection.com