An extender for holding boating accessories including at least a first limb and a second limb engaged in elbow relationship such that one can be pivoted with respect to the other about a transverse axis. At least one of the limbs includes a swivel portion that is able to turn about a longitudinal axis. At least one locking part moves longitudinally along a respective one of the limbs between locked and unlocked positions. When the locking part is in the locked position, it prevents the swivel portion turning.