Ideally suited for a wide range of applications and fishing vessels, the Tube Jr. Fishing Rod Holder is quickly becoming known as the most versatile rod holder on the market. This configuration includes the RAM ROD Revolution Ratchet Arm and 1.5" Tough-Claw. Combining the RAM rubber ball and socket system with a ratcheting feature, this rod holder has almost unlimited adjustability and configuration options. Easily collapse your spinning reel or baitcaster down on the deck for clearing your casting path or articulate over the water. Compatible with virtually any kayak and the OtterBox Venture Cooler. Clamping range (rail/tube surfaces): 1" to 1.875". Clamping range (flat surfaces): 0" to 1.6".