Believe other reviews that say the hammer head is soft. Just a few galvanized nails were enough to crack my head open. I'm very surprised how the head stopped being flat with so little use. A chewed surface will make nail driving much more difficult in the future. And it's a shame because that hammer had a great sense of balance. I bought this hammer thinking it would be good as a percussion instrument based on the Irwin name but now it's just another reason to avoid this brand.