Ideal for tinnies, this seat swivel clamps via threaded rod and wingnut adjustment on most tinnie bench seats, enabling quick and easy fitment and removal for storage. Moulded plastic base to minimise marking of unpainted alloy bench seat. Clamp rods are zinc plated, BLAck powder coated and have plastic coated ends to prevent marking of alloy bench seat. Clamp range adjusts to accommodate bench seats from 240mm to 540mm in width.