Review on 📏 Neiko 20713A Contact Digital Tachometer by Bill Russett

Overall a good product for the low price. As others have pointed out, putting in batteries is no easy task! I didn't use cheap carbon batteries, but branded alkaline batteries. It was not easy to install them in such a way that the battery cover could be closed properly. Also noteworthy; The battery cover does not slide off as advertised until the small screw is removed. Accuracy seems reasonable, although I doubt it's as accurate as the specs say. Unfortunately, there's nothing special about the reflective strip that comes with the mount. to the measured wave. It's just shiny, which means you can't measure the RPM of a shiny shaft! The instructions say to cover the shiny surface with black tape or paint it black! Luckily on my lathe the shaft just behind the chuck mount is black so the shiny tape worked fine. See attached photo. My drill chuck also has a black knurled tape. The problem is that the tape that came with it didn't stick to it so extra glue was needed. I was hoping that the reflective tape would be tuned a bit to match the internal laser to make it work on shiny wands, but I think that's expecting too much. from a product that sells for less than $30.