These popular insert router bit profiles provide all woodworkers access to the industrial-grade technology, at an affordable price. By replacing worn knives instead of sharpening standard carbide tipped bits, router bit dimensions, cutting quality and accuracy remain constant during the life of the tool. Ideal for routing: Â MDF, ChipboardSoftwood, HardwoodBenefits of the in-Tech Series include: Â Cutting accuracy remains constant during the life of the knife, Priced comparably to brazed router bits with at least 4 times longer tool life, Superior cutting quality, No resharpening costs, Harder grade tungsten carbideReplacement insert knives sold individually.