Framed photo of a shared place
A picture of somewhere that matters to both of you says "I remember" better than any card.
Dads are famous for being hard to buy for, often because they already bought the obvious thing themselves. The trick is to upgrade something he uses every week, or to give him an afternoon with you.
Lists are a starting point. Tell the generator one or two things about this particular person and get ideas no list would include.
New to this? Our guide to choosing a gift explains why recipients and givers judge gifts differently.
Buy an experience you do together, a consumable he enjoys (coffee, hot sauce, a tasting set) or a better version of something he uses daily but would never replace.
A booked plan: tickets, a table at his favourite restaurant or a written promise of a day together, printed and put in a card.