Connector for coupling attachment to power tool

A power tool, comprising:

• a first power tool portion having a rotatable collar and a first locking member arranged to be actuated by the rotatable collar;
• a second power tool portion having a second locking member;
• wherein the rotatable collar is rotatable about an axis for actuating the first locking member to removably engage the first locking member with the second locking member, thereby releasably locking the first power tool portion with the second power tool portion along the axis;
• wherein the first power tool portion further comprises:
• a groove on an inner surface of the rotatable collar;
• a stop member movable parallel to the axis between an extended position and a retracted position;
• and
• a biasing member biasing the stop member to the extended position;
• wherein at the extended position, the stop member is engaged with the groove of the rotatable collar such that rotation of the first locking member is obstructed;
• and
• wherein at the retracted position, the stop member is not engaged with the groove of the rotatable collar such that rotation of the first locking member is unobstructed.