Step 7: Test The Turn

Insert the key through the keyhole from below, as shown, and spin the bit. The notches should pass freely over the wards when you twist the key in either direction. Flip the key around and test the notches on the opposite side, too.
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    Tools List

    • bench grinder
      Bench grinder (optional)
    • warding file
      Warding file
    • table vise

    Shopping List

    1. Penetrating lubricant, such as WD-40