Would one consider the Casio DW-9052 a tool watch? I do. Why? Because, in my opinion it meets all the criteria based on the various functions included. I can time my rest periods between sets, count down how long I take to finish a workout, a cardio set or work shift, allegedly set an audible alarm (never heard a sound out of any Casio I own), it has illumination, and all by simply changing the screen to change to the needed function. So that being my position here's my Casio DW-9052 as the tool watch of the day