For optimum broadhead alignment, a square end on your arrow shaft is a must. This tool makes it super easy to achieve. Arrow squaring tool with sandpaper included $19 TYD. This squaring tool allows you to square both ends of your arrow shafts. You can also ensue a square and true end to the aluminum inserts after they are glued in place. Paypal only. Shipped within 24 Hrs. of order placement.