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HCS (High Carbon Steel) for use when cutting softwood, wood fiberboard, and soft plastic.
HSS (High Speed Steel) for use when cutting harder materials, such as metals, alu, and non-ferrous metals.
BIM (Bimetal) for use in hardwood, abrasive wooden and harder materials, such as non-ferrous and ferrous metals. This special bond of HCS and HSS fits the most diverse needs. Appropriate to avoid any shank breakage thanks to its flexibility, this material lasts much longer than HCS and HSS.