The Indusrial Pro Blade has three replaceable tungsten teeth. It is precision machined from hardened tool steel and cuts wood with a remarkably smooth and controllable cutting action. The Pro Blade teeth can be unlocked and rotated to expose a clean cutting surface. Pop recommends you rotate the teeth every two or three hours to prevent their self-tightening design to be come too difficult to remove. Blade comes with a Torx wrench.