The Guardian Fall Protection Bull Ring Anchor is perfectly suited for personal Fall Arrest, Restraint, or Work Positioning applications. For all applications, the worker weight capacity range (including all clothing, tools, and equipment) is 130 to 420 pounds. For installation onto minimum 3.5 in thick wood substrates.. Installs using (6) 16d nails or (5) .25 x 3 in steel hex head lag screws.