The Em-Pro Notcher will “slot-notch” metal up to a maximum of 20GA. Ideal for starting collars for ductwork or standing seam for fittings. The smooth power driven feed rolls and tool steel punch and die ensure accurate parts every time. Our stainless steel material guide means longer life even when running plasma cut parts. Made in Canada using only the best quality material and parts means peace of mind and years of trouble free running.