Advantage
1.Mass stock
2.Strictly quality control
3.API& ISO standard
4.Convenient transportation
5.Different sizes are available
6.MOQ:1 PCS
After -service quality guarantee
1.every bit has four years quality guarantee.
2.bits continous working time is about 150~200hours,if bearing is broken
or teeth dropped in this period of time,we can send you new one for free.
3.To customer placing big order,we can supply technical support.