The rod holder reduces the tedious work of holding the rod when the fish bites slowly. Works with most poles. Fully adjustable up and down, 360 degree rotation. Adjustable rod angle, compatible with bait rods and spinners With an adjustable clip, it can be mounted in many places. Maximum clamp opening: about 5cm Strong aluminum alloy body structure, durable and heavy use Fully adjustable up and down, 360 degree rotation.< /p> The clamp system accommodates different rail thicknesses and is wide enough to slide over the boat/barrel/side rail. Maximum clamp opening (optional ): about 5 cm / 1.97 inch It can also be locked to prevent the rod from slipping.