【Number】：RH-20 [Material]: aluminum alloy, industrial nylon [Specification]: can be clipped on the side of the boat 0cm-5cm 【Introduction】: Adjust the included angle direction 360 degrees, the upper part is the barrel, and the clip can be locked. Prevent the fishing rod from slipping outside. Barrel opening 3cm 【Number】：RH-30 [Material]: New industrial nylon with stainless steel screws [Specification]: can be clipped on the side of the boat 0cm-14cm 【Introduction】: Adjust the included angle direction 360 degrees, the upper part is the barrel, and the clip can be locked. Prevent the fishing rod from accidentally slipping, and the products are sold well in Europe and the United States 【Number】：RH-40 [Material]: 100% new industrial nylon, stainless steel screws 【Specification】: Dual use: kayak fishing, can also be clipped on the yacht railing. [Introduction]: 360-degree adjustment of the angle direction 【Number】：RH-50 [Material]: PA has good high temperature resistance and toughness 【Specification】: Dual use: kayak fishing, can also be clipped on the yacht railing. [Introduction]: 360-degree adjustment of the angle direction Specifications: 100% new and high quality 360 Degree-adjustable. It contains four stainless steel screws and nuts. Can be used for kayak fishing boat, it can also be caught on a yacht railing. Tough, corrosion proof, durable and long lasting Firmly and securely holds both conventional and spinning rods Can be mounted securely to a rail, side or flush to the gunnel of a boat / kayak 360 Degree-adjustable Durable and long lasting Firmly and securely holds Conventional and spinning rod Rotatable Fishing Rod Can be mounted securely to a rail Package Included: 1 x Boat Rod Holder Special models come with 4 screws