Includes: 1 twist drill 10 drill bits (sizes 0.4 - 1.2) Directions: 1. Select the desired drill bit. Turn the drill bit head counter clockwise to open the jaw. Insert drill bit and turn the drill head clockwise to tighten. 2. Place item to be drilled on stable and protected surface. Place drill tip firmly in place on item to be drilled and push with palm down on drill while spinning the body of the drill clockwise with other hand. 3. Spin drill until desired hole is achieved. Twist counter clockwise to remove from hole if necessary. Ideal for resin, wood and other permeable surfaces. Do not use on metal. CAUTION: do not inhale resin dust.