A blade change mechanism configured to attach a blade to a transmission rod of a power tool, the blade change mechanism including a support body, a blade retention structure, and a component. The blade retention structure is coupled to the support body and includes a blade retention component movable to hold the blade in a locked state in response to engagement of the blade with the blade change mechanism on insertion of the blade. The component is movable to vary the blade retention component to hold the blade in the locked state. The component is further movable to vary the blade retention component to an unlocked state in which the blade retention structure is disengaged from the blade. The blade retention structure is held in the unlocked state absent the blade being fully inserted into the blade change mechanism.