Works with 3-1/2" & 4" lally columns. Introducing the Lally Lock Springfield Plate for Lally Lock Columns. Same size, same thickness, and same hole configuration as the predecessor, the Springfield plate with ring, this plate has the Lally Lock center hole (instead of the ring) for attaching to any size Lally Lock Column. Once attached to a Lally Lock Column, this plate with the strategic hole placements means it can be used with any beam size. This is replacing multiple styles of the Lally Lock Beam plates down to one selection that serves the same function, and less confusion when ordering.