Hold them at the neck, between the thumb and first 2 fingers. No matter the size of one’s hands, this gives enough clearance to hammer without hitting knuckles. Holding the tool at the neck keeps the tool from skating or skidding across the metal. 

Holding the tools at the neck means they can be held with a more relaxed grip, which is much easier on your hands.

It can take some time and practice to get used to holding the tools lower down, but it’s well worth the effort!

You’ll find that, besides not hitting your knuckles, you will have much more control and precision over where the tools strike your metal!