The Simms next-generation Guide Nipper combine aerospace-grade aluminum architecture with surgically-sharp jaws for ideal performance with light to heavy mono or fluoro leaders and tippets. Details include 6061-T6 machined aluminum arms and riveted, stainless-steel cutters. 6061-T6 machined aluminum arms 17-4 H900 stainless steel jaws hardened to Rockwell C 44 Type II anodized & laser etched Riveted jaws, replaceable when necessary through Simms Repair Center.