How to build pc using laptop hard drive

there nothing wrong using a 2.5 inch latop drive if you have the right cables for it. the 120g ssd i have is 2.5 inches in size. the only issue is to have a case with a 2.5 mount or you have spend a few bucks for the pastice 2.5 to 3.5 inch rail or sled. then only other issue is that most laptop hd are 5400 rpm drives.