An extendable tool comprising: an outer tube ; an inner tube disposed movably within the outer tube , the inner tube including at least one receiving portion provided therein; a handle portion coupled with the outer tube , the handle portion including a slot provided therein; a slider member provided within the slot , the slider member adapted to slide within the slot between a first position ( P1 ) and a second position ( P2 ), with the slider member being of the spring biased type, wherein a spring generating this biasing force directly butts against the handle portion ; and a locking element provided in association with each of the outer tube and the inner tube , the locking element adapted to be selectively engaged with the at least one receiving portion such that the locking element limits movement of the inner tube with respect to the outer tube ; the extendable tool further includes: an engagement member coupled with the slider member , the engagement member adapted to slide within the outer tube , the engagement member including an inclined surface , wherein, in the first position ( P1 ) of the slider member , the slider member actuates the engagement member such that the inclined surface of the engagement member engages the locking element with respect to the at least one receiving portion ; characterized in that: the locking element is a roller ball; and the spring directly butts against the slider member . an outer tube ; an inner tube disposed movably within the outer tube , the inner tube including at least one receiving portion provided therein; a handle portion coupled with the outer tube , the handle portion including a slot provided therein; a slider member provided within the slot , the slider member adapted to slide within the slot between a first position ( P1 ) and a second position ( P2 ), with the slider member being of the spring biased type, wherein a spring generating this biasing force directly butts against the handle portion ; and a locking element provided in association with each of the outer tube and the inner tube , the locking element adapted to be selectively engaged with the at least one receiving portion such that the locking element limits movement of the inner tube with respect to the outer tube ; the extendable tool further includes: an engagement member coupled with the slider member , the engagement member adapted to slide within the outer tube , the engagement member including an inclined surface , wherein, in the first position ( P1 ) of the slider member , the slider member actuates the engagement member such that the inclined surface of the engagement member engages the locking element with respect to the at least one receiving portion ; an engagement member coupled with the slider member , the engagement member adapted to slide within the outer tube , the engagement member including an inclined surface , wherein, in the first position ( P1 ) of the slider member , the slider member actuates the engagement member such that the inclined surface of the engagement member engages the locking element with respect to the at least one receiving portion ; characterized in that: the locking element is a roller ball; and the spring directly butts against the slider member . the locking element is a roller ball; and the spring directly butts against the slider member . <EOS>