Wow. This guy costs a lot but really paid for itself. I have re-geared or rebuilt five differentials on my two Jeep Wranglers and my old Volvo 740 using this to set backlash, etc. Quality it worth expense if it saves you time and money in the end. This dial indicator did just that. I had a Harbor Freight dial indicator and magnetic base. It took inaccurate measurements. It caused me untold stress and aggravation. I purchased this and the magnetic base needed to do differential work and got things "dialed in" on the first attempt. This is a very accurate instrument. It is very well made. It is made in the USA by people who pride themselves on making some of the finest measuring devices you would ever need in your shop. Highly recommended!