By Brian Wilson Plant maintenance is significant in any industry. Quarries are not an exception either as the machines they use are in most cases damaged by heavy stones and the need to repair and carry out maintenance practices on them arises. Manganese jaw liners are some of the pieces of equipment that get used. Qualities of companies that deal in these liners include the following. A Technical competence of the employees of such enterprises is necessary. The workers in these firms should design efficient parts and back up stock if spares do not get provided. They should have samples of work they have done before which they should present to their clients. They must be confident enough to give customers their qualifications to show their experience and competence in the field. The reputation of the company should get checked by customers. Different companies offer different results and equipment. A client should ask for references from the manager so that he can get a hin...