Wire Straightening Tool Nylon. The Artistic Wire Straightener tool makes it easy to straighten wire that has been worked. Put the rollers in your hand in the open position with each of the rollers side by side. Lay the end of a piece of wire that requires straightening on the three rollers, then move the rollers until they form a triangle with the wire in the centre. Grasp the rollers in one hand holding tightly, then pull the wire through the rollers to straighten. May need to pull through a second time for highly bent wires. Nylon rollers help keep Artistic Wire coating intact.