Many times files are erased or formatted with critical data still inside. Our mission is to recover every megabyte of your important data with the appreciation that you entrusted us with this critical assignment.  
Hard drives with damaged heads & no motor or platter damage fall into this category. Read write head exchanges are common and have terrific success rates. Once the data is recovered it is available for download or shipped back on another drive.
When it's really bad we have the technology to tackle even the toughest data recovery situations. These recoveries normally have damaged read write heads but also include damaged platters, & damaged spindle motors.