Product name: 13-tooth stainless steel crampons Weight: 0.3kg Size: Available in M and L sizes Box size: Oxford cloth bag 1 pair, 100 pairs/box Color: Orange, Black Material: Rubber + Steel Wire Welding + Stainless Steel Claw Origin: Made in China New rubber material, strong toughness and not easy to break, stainless steel gripping teeth, not prone to rust.Ultra-lightweight with a non-woven storage bag, ice claws in hand allow you to maintain freedom during outdoor trips. This 13-tooth crampon comes in two sizes, M and L. Size M fits shoe sizes 36-40 and is available in orange and black colors. Size L fits shoe sizes 41-44 and is available in orange and black colors Most customers often assume that magnets attract stainless steel materials to verify their quality and authenticity. If it doesn't attract, it's considered good and genuine; if it does attract, it's considered counterfeit.In fact, this is a one-sided and impractical method of error identification 1. Austenitic type: such as 304, 321, 316, 310, etc.; austenitic type is non-magnetic or weakly magnetic 2. Martensite or ferrite type: such as 430, 420, 410, etc.; martensite or ferrite is magnetic. This stainless steel model uses 430 high-strength stainless steel, which has high hardness and corrosion resistance.