[Part Name] Actuator [Description] Locking gear. [Manufacturing] injection molding is used. [Reason for Using Materials] plastic is used as an inexpensive way to control the mechanism of the jigsaw since steel is not really required. [Forces Applied] torque applied to operate locking mechanism [Functional/Cosmetic] Cosmetic as it provides the user with more control over the jigsaw [Quantity] 2 [Complexity] 3 [Reason for Shape] 
be easily rotated by the user as a locking mechanism