The Malco RH4V 12Oz Riveting Hammer is ideal for both riveting and forming. With a solid one piece I-beam construction and molded-on vinyl grips, that help minimize recoil, this Malco RH4V is the perfect tool for your sheet metal projects. The Square face of this hammer is 3/4" wide with slightly rounded edges, while the cross peen tapers down to a 3/4" wide, slightly rounded edge, designed to help create consistent seams and lock edges, but it also good for inserting glazier points. both the face and the peen are individually hardened and tempered for strength and resiliency and the vinyl grip also offer exceptional non-slip gripping and comfort resulting in less hand fatigue without sacrificing durability. The Malco RH4V 12Oz Riveting Hammer, like many quality tools offered by Malco Products, has a Limmited Lifetime Warranty against manufacturers defects of either materials or workmanship.