1、Main Functions: Archery arrow spinner tester is used to make sure the straightness of arrows. It can also be used to test the balance and straightness of the wide arrowhead. It works with most types of arrows.2、Material: Archery arrow spinner tester is made of PLA and sturdy steel, and with sophisticated workmanship, which is very durable. It is an essential accessory for archery.3、Easy Operation: Place the rest of the archery on the probe and slowly turn the shaft with your hand. A good straight archery will hold steady. And it brings much convenience.4、Ideal Replacement: It is a wonderful upgrade replacement for broken or old one. Even after arrows have been cut and folded, the archery archery inspector are rotated again for inspection.5、Wide Applicaption: Archery straightness detector, used to determine archery straightness. Works with most types of arrows. And you can buy with confidence.