PRODUCT DISCRIPTION
M/F drill steel is an alternative to couplings sleeves to include the female part of the threaded connection as an integral part of the drill steel. M/F drill steel provides more rigid connections and is easier to uncouple and handle. The service life also tends to be better than with separate couplings. The advantages of drilling with M/F steel include: easy handling, quicker uncoupling, tighter connections, the potential to drill straighter holes, and longer service life.
For extension rod and M/F steel process, the below two different types of heat treatment are used to strengthen high speed and powerful percussive drill string components to maximize their performance and reliability. Longer steel larger in diameter, conventional extension steel, Hexagonal and round cross sections are available.
T60 Bench drilling Extension rod


Our factory pic
Package pics for reference
Factory :
1. We have 10-year engineering experience on drilling
We can provide detailed solution for you by email,phone and even video if you have any problems while drilling
2. Professional quality control system
Advanced equipment , International quality certification and ecperienced worker
3. In-time delivery
3 days if in stock; 15-20 days for production
4. Good after-service
1) Full compensation if it occurs that buttons are out ,broken and the body broken while button is worn less than 1/3
2) 24-hour online service
5. Strong production capacity
10000 pcs per month