NUMA down the hole drill

Numa Shank Drill Bits for Hammers are manufactured according to the best quality standards .Made from premium quality nickel-alloy steel for increased durability and wear characteristics,  and YK 05 tungsten. carbide as same grade as internationally well-known brand. Entire CNC processing procedure ensure the quality consistency and reliable. Designed for maximum performance and hole cleaning ability and high penetration rate.We can also provide the best solution for your mining, with higher efficiency and lower cost.