The GM Rod Post DX is a simple rod post that can be easily attached to fishing vests, waist bags, belts, etc., and is compatible with both bait rods and spinning rods. From "landing" to "wading", by using the GM rod post DX at the time of "lure change" and "landing", both arms become free and support all movements.inner diameter 35.Supported belt size Width: 25 mm to 53 mm / Thickness: up to 3.5 mm Accessories: Main body fall prevention original carabiner and spiral rope (200 mm)