The patented Metzner SM 4000 with a “Laser toothed wheel” system is a unique solution to process pre-slit corrugated tubes. The material-specific feed wheels guarantee a form-fit and twist-proof feed of the pre-slit material. The laser sensor controls the position of the feed wheels and releases the blade precisely on the crest of the ridge - with precise repeatability and up to 8000 cuts per hour.