Tool with rotatable head

An articulating power tool comprising:

• a main body;
• a base member including a first power transmission part configured to receive mechanical driving power from the main body;
• an articulating member pivotably coupled to the base member, the articulating member including a second power transmission part mechanically coupled to said first power transmission part;
• and
• a locking device coupled to the articulating member for locking an orientation of the articulating member with respect to the base member, the locking device including an actuation lever rotatable about a pivot axis between a free position and a lock position;
• wherein the articulating member is configured to pivot with respect to the base member in the free position, and wherein the articulating member is configured to be locked at one of a plurality of predetermined angles with respect to the base member in the lock position.