Auto mechan­ics use com­put­er­ized diag­nos­tic tools to run tests, pow­er tools, and sev­er­al more com­mon tools to do their job. He or she may choose to spe­cial­ize in var­i­ous areas of auto mechan­ics. Exam­ples include brake repairs, air-con­di­tion­ing (which requires knowl­edge of gov­ern­ment reg­u­la­tions), trans­mis­sions, or front-end mechan­ics. In gen­er­al an auto mechan­ic changes, rotates or repairs tires, fix­es worn brake pads or wheel bear­ings, changes oil, gives tune-ups and com­pletes inspec­tions. They nor­mal­ly work full-time and often times work week­ends plus over­time. They are most­ly employed by pri­vate busi­ness­es or are self-employed. The risk of injury or ill­ness is high­er than aver­age in this occu­pa­tion due to heavy lift­ing, cuts, burns and oth­er causes.