[Part Name] Button lock [Description] The button to lock the desired speed of the blade [Manufacturing] Plastic injection molding was used [Reason for Using Materials] was used because it is a common material for switches [Forces Applied] the user pushes the button [Functional/Cosmetic] This part is purely cosmetic as it is a handy feature for the user to extend his control [Quantity] 1 [Complexity] 2 [Reason for Shape] 
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