Used by both professional and DIY customers to bend flat metal into profiles used in roofing and siding of residential and commercial construction. Mark I & II series brakes have a 14 throat depth and are capable of bending & hemming .019-.032 aluminum as well as 16 oz copper, 29 ga.-32 ga. steel. These brakes also work with any of our accessories and are a must for anyone working with aluminum, vinyl siding, and roofing