How to Use a Drill : 8 Steps - Instructables
Step 2: Put the Chosen Bit Into the Drill. Loosen the chuck (the black circular section on the front of the drill) by twisting it counterclockwise to widen the diameter of the jaws that clamp onto the drill bit. Insert the shank (smooth part) of the drill bit into the jaws, and re-tighten the chuck until the drill bit is secured.
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