Feature:1. Main Functions: Archery arrow roller 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. Preminum Material: Archery arrow roller tester is made of PLA and sturdy steel, and with sophisticated workmanship, which is high durability. It is an essential accessory for archery.3. Easy to Operate: 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 tester 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.Specification:Item Type: Arrow Roller TesterWeight: Approx. 45g/1.58ozMaterial: PLA steelSize: 14.4x2.8x3.8cm/5.67x1.10x1.50in Color: Black.Package List:1 x Arrow Roller Tester1 x Sandpaper Note:1. Manual measurement, please allow 13mm error, thank you! 2. Due to differences between different monitors, the picture may not reflect the actual color of the item.