3M DBI-SALA 8 mm Permanent Horizontal Lifeline Systems make it easier for you to design, specify and install horizontal lifeline systems across a variety of industries, applications and orientations than ever before. Key features: Includes free cloud-based software to help calculate and design systems. Easier installation with a removable tensioning tool. Robust travelers offer continuous system travel, including bypass of intermediate and corner brackets. Below item numbers are for the PHLL travellers only. Call for Pricing.