I was just breaking up some kindling, lazily using a cinder block instead of a chopping block. I over-swung and the khukuri sailed through the hardwood 1x4 I was splitting up. No ting, no sound... there's a big divot in the cinder block.. and the tip of the blade has NO DAMAGE. I expected a chip, roll, or other deformation after smacking it into CONCRETE..but nope, it's fine. Amazing!