Feature:1. Aluminum Alloy: The main body of the arrow inspector is thickened and widened aluminum alloy, which has high strength and hardness. Integrated processing and cutting, sturdy and durable.2. Stainless Steel Roller: The roller on both sides of the arrow straightness detector is made of stainless steel, low resistance, stable rotation, silent design.3. Straightness Detection: This alloy arrow inspector used to determine the straightness of the arrow. The straightness of the arrow affects the accuracy.4. Easy to Operate: Put the arrow on the arrow measuring instrument and slowly rotate the shaft with your hand. Good straight arrows' arrowhead will stay steady.5. High Versatility: This arrow straightness detector is suitable for different types of arrows. DIY arrows by yourself, and is an excellent accessory for arrow detection.Specification:Item Type: Arrow Straightness DetectorMaterial: Aluminum AlloyGross Weight: 489g / 17.2ozSize: 31x6.5x6.5cm / 12.2x2.6x2.6in.Package List:1 x Arrow Straightness Detector2 x Spacer1 x Baffle