The Guardfather Spike IS BACK in Gold Green, Red, and Purple!! , SOLD OUT The SPIKE itself is hand machined TUNGSTEN hardened to rockwell 57. The collar and button are also hand machined stainless steel and the spring is also stainless. 9 inches overall with a 3 3/4 inch spring loaded spike this baby is ALL business. This is NOT on of those cheap extruded models. This is made by a company that supplies several nations with automatic edged weapons.