This polished nail is machined out of grade 2 titanium and designed to rest in the top 18mm joint of a dome set. The latest V3 edition features an awesome universal threaded shaft which allows the removal and height adjustment of all components. The nail includes a 1.75" threaded shaft, a large .5" diameter nail head, 3 resting fins, and a removable counterweight, all grade 2 titanium. The counterweight fits inside the 18mm joint to stabilize the nail, but it can be removed for thicker joints that don't accommodate a typical nail. The blades feature a small ridge to keep the nail centered, and they can be completely adjusted vertically to fit the smallest or largest of dome tops. All Highly Educated products are made in the USA.