Before buying you should know exactly what you're looking for. I take this Nails for medium-hard and stony soils. And on lawns. However, I have also always a set thinner titanium nails for very hard and stony soils there. The quality of these nails is not the same incredible and in the length and size of Titan. The Einsatzzweg is observed. Drift to the nail a hard object, so in addition to the hard ground again in one stone, you should put the nail something and not drive in with all his might.