Archery Whistle Sound Arrowhead Tip for Compound Bow Archery It Up: It can Screw On and off from a lot of different Material Type of Arrows(Fiberglass/Carbon/Aluminum Arrows). Archery Practicing: Cooper Tip,makes Whistling Sound After Arrow Release from Your Bow. Cool Looking: Great Colorway,Surface-Soldering makes a little bit Shiny under the Sunshine. Pretty Cool When you Take it Out. Dimension:About (125grain) 7g in Weight,Very Light Weighted. Note:Pointy & Sharp as it is. Keep it Away from Kids, and Be Careful When Loading. Anyway, Have Fun and Wish you Take Some Kissass Shoot!