Electronic spine tester by Bearpaw.

One of the most important issues for successful shooting and good results is the exact measurement of an arrows spine value. It doesn’t matter if you talk about the high-performance of a technical archer, the traditional target/field scene or bow hunting; without correctly matched arrows those all important scores will be lost. This revolutionary digital spine tester is the result of many years of German engineering and intense development by Bearpaw. This spinetester uses a digital measuring method which will give you exact tolerances and measurements shown on its LED screen. The spine tester calculates the exact bend of the arrow shaft in the range of 1/100 mm and guarantees a perfect result every time. The digital display indicates the exact analysis of the measurement both showing the unit in lbs and optionally the exact spine value. There's no need to convert the values once again by using tables.

An excellent machine and a must for any true arrow maker.