[product name]: exclusive multi-functional double stick knife [performance test, non professionals, please don't imitate] [sharp blade]; nunchaku, a strange weapon handed down from ancient China. It is short and powerful, and ordinary people can play more than 160 Jin of force. Chinese superstar Bruce Lee carries it forward [blade material]: forged with high manganese steel [fittings]: forged with stainless steel [sheath material]: brown leather [suitable for] collection and self-defense couple distribution, housewarming gift, martial arts fitness Exquisite decoration [gift]: exquisite brocade box, nursing oil. [performance]: please see the test video [technology]: the blade is handmade by dozens of ancient Longquan methods, such as tempering, roughing, hot forging, shoveling, filing, grinding, heat treatment (quenching) tempering, primary repair, finishing, etc