With a future Hall of Famer visiting their building, the Giants made two depth signings.

The Giants agreed to terms Friday with special-teams-first linebacker Demetrius Flannigan-Fowles and defensive tackle Jeremiah Ledbetter, The Post confirmed.

Flannigan-Fowles, 28, has 96 career tackles — plus one sack and one interception in his limited defensive role — in 73 games over five seasons with the 49ers.

Ledbetter, 30, is coming off his most productive season. After clawing to stay in the league since he entered as a 2017 sixth-round draft pick, bouncing around teams and not playing any regular-season games in 2019 or 2021, Ledbetter had 38 tackles and two sacks for the Jaguars last season.

Quarterback Russell Wilson visited the Giants in East Rutherford while the other moves were being made.