Lindstrom Rx7590 Round Nose Plier. The Rx series exemplify state of the art hand tool design, function and performance. Micro-Touch handles make possible complete hand control for precision work. BioSpring reduces spring tension during work which lessens fatigue. Tension and opening width can be adjusted to suit by moving the end of the spring to the desired opening in the handle. Slightly rounded and wider profile of the Rx handle allows for even surface distribution and superior hand contact.