my driver is a D4 should all my clubs b a D 4?
If all your clubs had the same shaft as you have in your driver then the D4 swingweight could work for the whole set. You likely have a graphite shaft in your driver but if you have steel shafts in your irons the D4 swingweight with the heavier shafts might not work as well. You can hit some shots with one of your irons with a face impact label on the face and note the pattern. Use some lead tape and increase the swingweight of that iron and again hit shots with a new impact label. Having the correct swingweight for you will create a tighter pattern of shots on the impact label. We initially reference swingweight to shaft flex. We reference a D1 swingweight as an average swingweight for an R flex with a range from C8 to D3 that could still work for different players.