1.It is made of high-quality cast iron. 2.It is one of main attachments for drilling machine ModelWidth of jaw (mm)Height of jaw (mm)Max.opening (mm)G.W./N.W (kg)Packing volume (cm)Packing shapeQ191/2A67247021/19 10sets33×32×21CatronQ193A78197822/20 10sets32×30×22CatronQ194A1002611032/30 10sets37×35×26CatronQ195A1252612844/42 8sets43×30×29CatronQ196A1502615032/30 5sets40×25×32Catron