Every bead is made of 316s stainless steel, skin-friendly, can be used as fashion bracelet, fashion necklace, or car decoration 3 big beads can move across the bracelet freely, so you can use it as a glass breaker or Self Defense Whip by controlling the weight position The threading rope is made of 2mm diameter steel wire, can bear 250kg weight at least, very durable and robust The clip is made of high quality alloy- waterproof and solid. It can be also realesed by a screwdriver easily, convenient for replacement Non-violence EDC Self Defense Bracelet,legal completely, It can be carried anywhere. Product Features: Small bead diameter: 10mm Small bead weight: 3g Big bead diameter: 26mm Big bead weight:46g Length A(for wrist circumference 16cm) full weight: 514g Length B(for wrist circumference between 16cm to 17cm) full weight: 523g Length C(for wrist circumference 17cm) full weight: 532g The bracelet is a little heavy, it is especially suitable for strong men. Please pay attention to the weight before purchase It is also better to measure your wrist diameter before purchase.