Undercover Ninja Triple Edge Death Defense Spike Nail - TOPHATTER'S ARMORY DEALSTriple Kill Ninja Defense Spike. The three edges on this defense spike are perfectly complimented by a pyramid tip. The steel used to make this blade is a high strength stainless steel. It is both durable and accurate. Balance is necessary for a good defense spike. This particular throwing knife is crafted from one solid piece of hard steel and individually perfected until it achieves an accurate balance. The handle is made with a solid grip and each