B Baosity Bicycle Tool Spoke Tension Meter, Mountain Bike Rim Tension Measuring & Adjustment Tool for Road Bike Wheel Spokes Check & Correction

When you lace up a rim, fine tuning the spokes is a must. However, if you over tighten them you can make a long day for yourself and an unsafe build. I am not sure why some are so much more than this one, because it seems as good a quality as anyones on the market. I have had no problems with mine after several lacings.Shipped quicker than i was expecting as well.