Numa is the world's leading rock drilling technology provider, dedicated to ongoing product innovation and results-oriented consistency. We've built a strong legacy of high quality, U.S. made hammers and bits for drilling holes 3½ - 50½ inches (89 -1283 mm) in diameter. With over 100 hammer and bit products serving 11 different industries, our products are capable of drilling vertical, horizontal, and reverse circulation holes in hard rock and unconsolidated formations.