With a fully knurled nail tip spanning 22 mm (3/4 in.) on all fastening lengths, the X-U Fastener achieves a reliable hold at reduced penetration depths. The twist design of the knurling results in a “screw” effect, while the fully-knurled point, thicker shank and high material hardness allow higher application limits on steel and increased fastening consistency in hard concrete. The fastener also resists bending when penetrating even the hardest base material. Hilti. 800-879-8000. www.us.hilti.com.