Tension of regulating spring is constant so marks made by point are uniform in depth and size for each setting. Easily removable point. No hammer required mechanism automatically strikes a blow when downward pressure is applied. Adjustable knurled cap regulates force of blow. Specially selected tool steel is hardened and tempered to the proper hardness. Knurled finger grips for ease of handling. A special tempering process makes the head less likely to fracture from a hard off-center blow