The 6.50" length is made so the use of an extension is not required . It is used on head stud nuts and clutch stand stud nuts. Not for use with an air Impact gun (rattle guns). Socket is made from durable heat treated steel and will provide years of service if taken care of properly.
If you have ever adjusted the stands on a clutch with the can on and dropped the socket in the can, then you know how handy this tool can be. It extends outside of the can.
Racer can chose socket size from drop down menu for their application.