Check the listing for details. Point Alignment Straightness Detector Tool Archery Arrow Spinner Inspector Vanes. Color: Black, Condition: New without tags. Listed at 23.69 USD. Item Description Item name:Archery Arrow Inspector Material: ABS Color:Black Net Weight:146g Package Weight:185g Item Size:10.3x3.3x3.2"/ 26.2x8.5x8.2cm Fit for: all kinds of arrows, carbon arrows, fiberglass, aluminum arrows .etc Function: Vane and Feather balance. Broadhead balance. Arrow shaft straightness Nock alignment. Feather and Vane Check : place arrow on the Arrow Inspector and rotate slowly.Leave arow in one position.If arrow rotates,inspect the vane or feather that faces downward. A well balanced arrow will remain stationary when rotated to any position on the Arrow Inspector. Field Point Check: Spin arrow with field point in arrow and check for straightness. Arrow Shaft Check : Spine arrow with broadhead in arrow , if you see a wobble,most likely the shaft is not straight,or the insert is glued in crooked The Arrow Inspector is a precision instrument designed to help insure a smooth and accurate arrow flight. Features low friction machine cut steel axles and precision cut aluminum wheels - to detect even the slightest bend in an arrow shaft or unbalanced arrow. Ideal for hunters, target, and 3D shooters and archers who fletch their own arrows. A quick spin on The Arrow Inspector will let you know if you can trust that arrow again for a straight, accurate shot.