The light alloyed body is equipped with 4 or 6 «segments» with TCT cutting edges resharpenable like a sawblade, and with possibility of substitution. The coupling of more elements for cutting widths with multiples of 30 mm can be made with a specific assembly, which must be required when ordering. Types «A» and «B» have the internal hub, while «C» and «D» have the hub in line with the body width.