Gemtor vba-121, fixed beam anchor fits 4″ – 12″ wide features: stainless steel construction installs without tools mounts to vertical i-beam or top or bottom flange of horizontal i-beam lightweight yet extremely strong and durable can be used as single attachment point or for horizontal lifeline endpoint vba-121 – fixed beam anchor for vertical or horizontal i-beams, fits beams from 4″-12″ and up to 1 1/2″ thick.