De La Rosa Pliers With Grooves & Spring Product Details: De La Rosa Wire Forming Pliers, with Grooves & Spring Precision matched concave and convex tips for smooth contouring of light wire loops. Contours and forms arches without torquing with additional grooves measuring .016″ (.41mm), .018″ (.46mm) and .022″ (.56mm) respectively. Cab be used on wires up to .021 x .025″ (.55mm x .64mm). Handcrafted by the finest grade surgical stainless steel. Corrosion resistance and completely sterilisable.