Made from PolyLactic Acid (PLA), this single-used Biodegradable Unloading Bolt provides a cost effective way to unload your crossbow in the field without having to chance ruining a perfectly good arrow. At about one-sixth the cost of a crossbow arrow, this biodegradable bolt minimizes environmental impact by naturally decomposing in the same way as fallen leaves. Available in a convenient 6-pack, this innovative snap-together design occupies about the same space as two side-by-side ball-point pens.