With a paired wire helical design, this basket can open and retain a helical shape within the ureter. Its design allows for it to capture and secure grasp of small stone fragments and calculi. . Atraumic stone manipulation is made possible with the round-wire construction. There are multiple configurations and sizes available, including 5, 4, and 3 paired wire baskets and 3.0F and 2.4F sheaths. The 5cm filform tip is tipless. There is no detectable lax in the product.