7cold rolled steel; consists of screw 0.625 in. Diameter by 1.750 in. Lg; block 1.250 in. Lg by 1.125 in. H by 0.500 in. W; bushing 0.203 in. Diameter by 0.500 in. Lg; standard drill rod w/socket setscrew 4.250 in. Lg by 0.250 in. Dia; two 8-32 screws; chain