Hall Intrex blades: One complete system of large bone blades with no tooth offset, for an exact fit with the knee guide and depth markings for increased accuracy. For increased rigidity, these blades are manufactured from high quality enhanced chromium steel - providing minimal flex compared to similar blades, even at 0.89 mm blade thickness. These blades provide maximum cutting efficiency and reduced chatter, even on the hardest bone while the debris clearance channels reduce clogging to minimize the risk of thermal necrosis.