For the price I expected better. It was a numbered set of 60 drills. Each place in the index has an exercise, but I noticed that place #3 in the index contains exercise #4. Instead of #4 was #5. Missing: #3, #45, #55, #57. Duplicates: #47, #48, #53, #56. Of the 60 bits only 5 were in the right position The index.