This urethane bit is perfect for sheet metal forming. The metal holder comes with a replaceable 1" round 75d urethane. The metal holder can be used with other urethanes as well. The included 75d urethane is perfect for making soft forms in copper, gold and silver. This tool works with the red and blue handles. 
 
Up to 95a urethane is available by custom request (it may have an additional charge and take more time based on urethane availibility)