DBI-SALA Advanced Uni-Anchor Base w/ Tie Off Anchor for Fall Arrest Post* The uni anchor for portable fall arrest post permanently welds to existing structure in locations of frequent use, or where the use of a portable base is impractical. * Bare metal design is ideal for weld on applications, must be finished after installation or used in environments without chemical or moisture exposure. * The high strength bare steel construction does not include any finish or plating making it easy and safe to weld to existing steel