By simply clamping the knuckle of the arm to your seatbox leg, the Preston Offbox Extending Brolly Arm can perfectly position your Bait Brolly. With a super sturdy design and a telescopic adjustable main bar, it's perfect for using with the Offbox Bait Brolly.Compatible with the Offbox Bait BrollyOffbox clamping knuckleTwist to lock brolly clampTelescopic adjustable main barClosed width: 46cmFully extended: 72cmColour: Black