Material: 304 Stainless SteelStandard: GBSizes: M4 to M16Features: The product is made of 304 stainless steel, with good corrosion resistance, oxidation resistance and warmth resistance, excessive strength, high toughness characteristics.Usage: Outdoor tenting Umbrella rope bracelet buckle Survival bracelet with U-shaped metallic buckle carabiner Hanging buckle D-shaped buckle, with screw rod buckle, rope buckle, get away rope buckle.You can find extra merchandise in different material, type, color , sizes and shapes in our shop! If you have particular needs, please touch us, we will customise per your needs!Package includes: 1 piece * According for your choiceNotes:1.The color of the picture is barely diversified from the genuine object due to the camera and light effect, please take the particular object as the standard.2.There might be 0-0.3mm error for its thickness, 0-3mm error for its diameter / width / length in the manual measurement, please take it into consideration, thank you!