A sanding drum assembly comprising: at least one elastic friction member defining an outer perimeter; a bushing including a base portion and a plurality of feet located inwardly of the at least one elastic friction member, each of the plurality of feet including a movable portion movable between a first position whereat the plurality of feet define a first outermost circumference and a second position whereat the plurality of feet define a second outermost circumference, wherein the second outermost circumference is larger than the first outermost circumference; and an actuator, wherein the plurality of feet and the actuator are configured such that as the actuator and the plurality of feet change from a first configuration to a second configuration, the plurality of feet are forced from the first position to the second position, wherein the relative position of the actuator and the plurality of feet is changeable along an axis, and the second outermost circumference is located radially outwardly of the first outermost circumference with respect to the axis, wherein the base portion includes a central bore, wherein each of the plurality of feet is hingedly attached to the base portion and the actuator includes a shaft portion extending through the central bore, wherein each of the plurality of feet comprises: a lower foot portion extending upwardly and inwardly from the base portion to a neck portion; and an upper foot portion extending upwardly and outwardly from the neck portion, characterized in that the actuator is configured such that in the second position the actuator, under the elastic pressure applied by the at least one elastic friction member tends to force the bushing downwardly thereby locking the assembly. at least one elastic friction member defining an outer perimeter; a bushing including a base portion and a plurality of feet located inwardly of the at least one elastic friction member, each of the plurality of feet including a movable portion movable between a first position whereat the plurality of feet define a first outermost circumference and a second position whereat the plurality of feet define a second outermost circumference, wherein the second outermost circumference is larger than the first outermost circumference; and an actuator, wherein the plurality of feet and the actuator are configured such that as the actuator and the plurality of feet change from a first configuration to a second configuration, the plurality of feet are forced from the first position to the second position, wherein the relative position of the actuator and the plurality of feet is changeable along an axis, and the second outermost circumference is located radially outwardly of the first outermost circumference with respect to the axis, wherein the base portion includes a central bore, wherein each of the plurality of feet is hingedly attached to the base portion and the actuator includes a shaft portion extending through the central bore, wherein each of the plurality of feet comprises: a lower foot portion extending upwardly and inwardly from the base portion to a neck portion; and an upper foot portion extending upwardly and outwardly from the neck portion, a lower foot portion extending upwardly and inwardly from the base portion to a neck portion; and an upper foot portion extending upwardly and outwardly from the neck portion, characterized in that the actuator is configured such that in the second position the actuator, under the elastic pressure applied by the at least one elastic friction member tends to force the bushing downwardly thereby locking the assembly.