The Zephyrtronics ABC-L is a set of 4 additional/replacement standard posts used for ABC series adjustable board cradles. The 8 posts permit your ABC to be "flipped" upside down for either inspection or in de-soldering thru-hole chips and connectors. The ABC-LG's are 5"/125mm Lg. It comes with brass knurled locking nut & non-skid feet.