For this ratchet design, you will need:
- 1/8" plywood, 150 mm x 300 mm
- 1/4" dowel rod, 45 mm long
- Four bolts, 3 mm x 20 mm
- Two wood screws, #4 x 1/2"
- Four nuts, 3 mm
- Small spring (this example uses a click pen's spring, 3/16" diameter)
- Wood glue
- Small clamps
- Small screwdriver