Sanrenmu SRM 4059BUC-PH Pocket Portable Folding Knife Back Lock Self Defense Survival EDC Tools Gift Choice DOINGOUTDOOR Store: if you get defective goods, please let us know ,we'll ship again to you from Amazon stock and you needn't return the defective one!! The blade material is a high performance stainless steel. The hardness of HRC58 guarantees a perfect balance between hardness and suppleness. Creative Designs as well as the combination of classic and fashion generate fascination and enthusiasm. 100% quality tested.