-Fully hardened, expertly tensioned tool steel bodies absorb impact, remain flat and true, and resist excess heat build-up-High-grade, C-3, fine-grain tungsten carbide tips resist erosion for extended blade life-Aggressive rake angles for maximum cutting speed and efficiency-Each tip is precision honed on all four exposed surfaces. This minimizes micro-chipping along the sharp edge of the blade and results in a sharper, longer-lasting edge-Thin kerf for less waste and lighter cutting performance (reduced feed pressure)-Inserted tooth design on some models greatly increases the body-to-tip braze area for greater support and tip strength-Expansion slots and/or variable pitch gullets keep blade cool under stressful work loads-Can be resharpened for extended blade life