Aside from whats been mentioned one thing I like about ball peens is you don't need to be lined up to strike a blow. On a flat faced hammer you need to come down pretty well straight in line with the object but a ball peen will deliver the force even if you deliver the blow from a side angle and sometimes that's the only angle you have. Also as mentioned - peening rivets or any metal. Got an old pair of pliers that the rivet is loose on so they wobble? Lay them on your anvil or heavy piece of steel, place the ball of you 24 oz hammer in the centre of the rivet and come down hard on the flat face of the hammer with your 48 oz hammer. Now try the pliers, if they aren't tight do it again. I like keeping a selection of ball peens above every bench from small to large and will only grab the size needed for specific tasks.


