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Name: Thickened Four-Finger White Bone Ring--Knuckle Duster Material: Zinc Alloy Size: Product length about 112mm height 65mm thickness 10mm Finger hole diameter: 23mm Weight: about 128 grams Packaging: Single transparent neutral OPP bag packaging Function: Suitable for collezione responsabile collezione responsabile and collezione responsabile, outdoor vehicle equipment collezione responsabile; travel or home standby collezione responsabile emergency survival, it has simple functions and can be mastered almost without special practice. It is a very practical product. Note: The surface treatment process of the product is divided into two types: electroplating and spraying. Bronze brass color, silver surface electroplating treatment. Black is spraying. Due to the characteristics of the process, electroplating and spraying need to be hung up for processing, and inevitably one of the inner edges of the finger hole will have an electrical contact point and a spray hanging point. The contact and hanging points of this product are selected on the inner edge of the finger hole, which has less impact on the overall product; the electroplated surface and paint surface of metal products will inevitably have fine scratches and mold marks, polishing and grinding marks, please be aware! If you mind, please think twice before placing an order with perfectionists; The product is made of zinc alloy in one piece. The die-cast zinc alloy has good mechanical properties at room temperature. However, the tensile strength at high temperature and the impact performance at low temperature are significantly reduced. It is not suitable for use in high temperature and low temperature (below 0??) working environments. Note: Please pay attention to the maintenance of metal products. It is easy to cause rust in high salt, high alkali, and high acidity environments. Please wipe off the sweat on the surface for long-term storage. If necessary, you can apply a layer of motor oil on the surface to form an oil film to isolate air oxidation.