... high speed, competitive price and easy operation. Screw making machine, bolt making machine, cold former, rivet making machine Features:1. Used as one die two blow ... function of two die four blow former), screw drawing machine, hollow rivet making machine. 2.Unique and patent technology of non-clamp blank ... 22mm and 1st Die dia.38mm)Note2D3B-K2 is used for producing tubular parts. Screw making machine