Tungsten carbide particles are self sharpening, so when a particle chips, a new surface is created in its place. Resist heat and abrasion which have no teeth to dull or chip. 2-3/4 in. bladeAre tough and durableResist heat and abrasionHave no teeth to dull or chipProvide smooth cutting even in thin materials without snaggingCut abrasive, hard and difficult materials even in awkward situationsAllow for sharper turnsCut on both the up and down strokeFit all popular makes of power tools