3M™ DBI-SALA® Roof Top Freestanding Counterweight Anchor is is a critical component of your crew’s personal fall arrest system. Suitable where occasional or temporary fall protection is needed, this anchor system provides a secure tie-off point for individual workers working on flat or sloped roofs up to five degrees. This freestanding anchoring device is easy to install while delivering exceptional strength and durability on the job. Allowed on wood, concrete, or bitumen surfaces.