I would like to preface this review with this statement; “I do not order items that I do not intend to use myself or install myself for someone else.” Having said that;This IS a definite purpose tool that unless you are a shop mechanic that works on semi's every day, you will NOT be using this often HOWAEVER, when you do NEED it, it damn well does the job it was designed to do. I have used it three time in my resto cabover and the time alone it saved me made it worth every penny spent.When you need it, you NEED IT.