I learned this trick in a Sports Afield magazine. All it is is a quarter inch washer pressed between your arrow and your field tip. Be sure to tighten your tip with pliers so its good and tight.It causes more of a blunt impact and most of the time your arrow wont fly ten miles after a pass through shot.It tends to slow the arrow down while really traumitizing the animal.WhenI hunt squirels I normally use a Flu-Flu so I dont have to be limited to ground shooting only. I have used broadheads before and actually stuck arrows in oak trees to high to reach, I bet some are still there. With this setup, throwing a few branches at the arrow willnormally wiggle it loose enough to fall. If hunting ground animals I recomend using a judo point to keep your arrow from burying itself in the grass.