The Rubber posts/fingers let the arrow flex and bend for better tuning
and come in #1, #2, #3. Each are a different stiffness. Each post/fingers has springs. This lets the arrow flex more
if needed and posts/fingers last twice as long. The posts/fingers can be replaced. Because the are rubber. They are quiet
and last a long time with the springs and rubber posts/fingers. They last 3 to 4 times longer than a biscuit. Because the
vanes pass through the posts they don't ware on the vanes like the biscuit. The body is made of aluminum. Light weight.