1.Replace for free in 5 working days:
1)For Hammer:
  In the early stage, any breakage at outer cylinder, piston, chuck sleeve of the hammer.
2)For Bits:
  Any breakage at the bit shank during half service life span.
  Drilling in very hard rock, the breakage of tungsten carbide inserts is less than 1/7, but there are more than 2 inserts falling out or breaking in the hole.
3)For shank adapter:
  Any breakage at the shank during half service life.

2.Repair as the customers' requirements in 7 working days

1) For hammers: Not so good working performance because of some light wearage in the main impact parts.
2) For bits: Two inserts fully falling out from the holes during half service life.
3) Any improvements the customers need.

3. Not available compensation
1)All the products which are in the expired service life.
2)Using our bits in bulk, the first two or three bits have abnormal wearage, the using should be stopped, and feedback should be given to our company. Otherwise, the company won't be responsible for any loss of the customer.
4. Compensation up to the concrete conditions
1)For hammers: The abnormal wearage whose causes can't be found out.
2)For bits: The breakage in the shank or inserts when using in limestone, weathered rock, and other unnamed soft rocks.
The final interpretation rights belongs to our cpmpany。