Numa is the world's leading designer of rock drilling equipment with over 100 DTH Hammer and Bit products serving 11 different industries. Our products are capable of drilling vertical, horizontal, and reverse circulation holes from 3 to 48 inches (89 1, 219 mm) in diameter and are used in 105+ countries. We have built our customer centric reputation on providing the highest value in products, performance and personal service available in the rock drilling marketplace, Drilling Rig Tools ...