Clock making is a snap using this quartz clock movement kit. Design your own custom clock face from scratch, or find an existing clock face that just needs a little updating. Once you have the clock face, you can quickly and easily install the included movement mechanism and hands to complete your project. Details: Black Use on 1/4" (0.6 cm) thick clock surfaces Requires 1 AA battery (not included) 8 pieces ABS plastic and aluminum Contents: 1 quartz clock movement mechanism (1/4"/0.6 cm) 1 rubber washer 1 brass washer 1 hex nut 1 open nut 1 hour hand 1 minute hand 1 second hand Instruction sheet included