Allows you to change 1/4 male interfaces to 3/8 male interfaces, or 3/8 female interfaces to 1/4 female interfaces Can be used for product with 3/8 screw interfaces such as tripods, selfie poles, DSLR cameras, surveillances cameras Aluminum alloy, nonslip, wear-resistant, lightweight 1/4 female to 3/8 male tripods extension rod, about 10cm long The bottom is 1/4 screw female interfaces, and the top is 3/8 screw male interfaces