This cable crossover variation isolates the chest by sweeping the arms from a wide stretch to a squeeze in front of the body, with the front delts and serratus assisting. The cables keep tension on the pecs through the entire arc, including the peak contraction where free weights go slack. Lifters use it after pressing work to add chest volume without loading the shoulders heavily.
Log your cable crossover variation sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.