Rod holder for grouper and amberjack, spinning reel specification, rod clamp specification. (Rod holder only) Clamp not included. Rod clamp φ8mm specification. (Shaft is 8.1mm) Please check the dimensions of the clamp section from the 10th photo onwards. Made of all stainless steel with 6mm flat bar specification. The rod holder base and rod clamp are not integrated, so they are tightened together with bolts. This is a new creation, but there may be minor scratches due to the manufacturing process. Please judge from the photos. The final finish is polished to a shiny finish. Fixing hole φ12, M12 compatible, single-point fixing possible, and even more secure with two-point fixing. (One is a slot) Hex socket head bolts are recommended for the fixing bolts. (The ones you turn with a hex wrench) (Normal bolts are also acceptable) 3 patterns of angle adjustment are possible. Above all, it's compact, with a total length of 35cm and a weight of about 1200 grams, lightweight and can be stored in a bag, very convenient! Perfect for two rods! Also, it is ideal for use with ishidai (striped beakfish) rods. I have been using the same product for 10 years, and there has been no deformation of the flat bar even with over 10kg fish. Furthermore, rubber spring equipped for load absorption! I don't know about the 20kg+ class! LOL Perhaps it's intended for up to 20kg. The rubber plate on the receiving part is attached with double-sided tape. Please reapply when it peels off with use. I will accept questions, but I have carefully manufactured each part, and it takes a considerable amount of time, so I would appreciate it if you could refrain from price reductions. Thank you. Stainless steel is a rust-resistant material, but it is not necessarily rustproof. The next production is undecided, but I plan to list it. Please check the product carefully after purchase. In that case, please contact me with a message before the evaluation. I am also listing on other sites, so if a purchase is made there, I will delete this listing at that time.