Its 280 mm long. and cross section at end needs to be reduced. Thank you Sir; it is of 13 mm diameter OD which has to be necked down to 10 mm. i have tried using screw press and necking die, using mandrel but the component is cracking at one end or in some cases just buckling,twisting. 13 mm diameter OD which has to be necked down to 10 mm. i have tried using screw press and necking die, using mandrel but the component is cracking at one end or in some cases just buckling,twisting.wHITE CANE.pdf