My first polymer hammer and I love it. I had to sand the surface of the hammer a bit to keep off-center hits from slipping off the bit. I saw no damage when connecting the dovetails. Got a little green scuffing when I had to give the mortise and tenon a good punch to bring them together, I like the tight fit. It made the sand instantly. It feels well balanced and the hit is a solid deadbeat so there is no vibration in my hand or chisel.