Rock drilling is a complicated and difficult work, especially high strength rock drilling to cause much difficulty for a constructor, so you must have a high efficient and durable drill digging tools to cooperate with. The simple structure and unique design make PERAK series become reliable, excellent and easy controllable drilling product. With different models from 3 to 33 inches which coupled with MB drilling, MES, MNX or MRS pipe drilling system, PERAK series could deal with all kinds of different stratum drilling work. The diameter from 90-1200mm, otherwise, we can also produce the custom size you need. Each type of DTH hammers are fitted with standard API connections, or others connections can be produced as follow to your requirements.