Setting up a trap bar deadlift with resistance bands anchored to the floor and looped over the bar adds extra tension the higher you lift. The band resistance forces your hamstrings and glutes to keep driving hard through lockout instead of the load tapering off near the top the way it does with plates alone.
Log your trap bar banded deadlift sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.