That's his specialty.
वह उसकी ख़ासियत है।
an asset of special worth or utility: strong suit, strength, speciality, strong point, green thumb, long suit, forte, green fingers, plus, asset, metier
the special line of work you have adopted as your career: speciality, career, calling, specialisation, specialism, vocation, specialization
a distinguishing trait: distinctiveness, individuality, speciality, idiosyncrasy, individuation, foible, peculiarity, mannerism, individualism, specialness