Bench fly with cable tension that never lets up.
Keep the elbows soft and fixed. Sweep in a wide arc, don't press.
Lying on a flat bench between two low pulleys gives you a fly where the tension never disappears, unlike a dumbbell fly, which goes nearly weightless at the top, the cables keep pulling your arms apart even as the handles meet over your chest. Your pecs work the full arc from deep stretch to hard squeeze, with your front delts assisting the sweep. It earns a spot as arguably the best strict fly variation going, all stretch, all squeeze, no dead zones.
For constant tension, yes. Dumbbells load the stretch hard but give you nothing at the top, cables resist you through the whole arc including the squeeze, so every centimetre of the rep is doing work.
Bring them together over your chest and squeeze, they can meet or nearly meet. What matters is that your chest closes the arc, not that momentum claps your hands together.
Pulleys on the lowest setting with the bench centred between the stacks. You want the cables pulling down and out from your arms' path, if they drag toward your feet or head, recentre the bench.
