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.