Feature:1. [Practical and Convenient] Archery straightness detector, used to determine archery straightness. Works with most types of arrows.2. [Premium Material] Made of high quality aluminum alloy, it is very durable and can also be used to test the balance of broad head. It is an essential accessory for archery.3. [Simple 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.4. [Check Defects for Arrows] Make your own arrows and use archery straightness detector to check for defects before cutting lengths.5. [Rotation Again] Even after they have been cut and folded, the archery archery inspector are rotated again for inspection.Specification:Item Type: Archery Straightness DetectorMaterial: Aluminum Alloy +PE Color: Blue Applicable: For ArrowsSize:Length: Approx. 30cm/11.8in.Package List:1 Set xArrow Straightness Detector (3 Accessories)Note:1. Due to manual measurement, please allow 13mm/0.030.1in error, thank you! 2. Pictures may not reflect the actual color of objects due to differences between different monitors.