Unscrew the battery cap from the back of the Victorinox flashlight. Place the battery cap aside. Remove the batteries from the battery compartment and place them aside also.
Unscrew the reflector from the front of the flashlight. Place it aside.
Stand the flashlight on a table with the front facing up. Hold the flashlight in place by grasping it from the side with one hand.
Hold the needle-nose pliers in the other hand. Insert the needle-nose pliers into the front end of the flashlight. Grip the base of the bulb on the socket inside the flashlight. Twist the base of the bulb counter clockwise to loosen it from the socket. Repeat this action a quarter turn counter clockwise. Remove the pliers.
Unscrew the bulb from the socket with your fingers. Dispose of the bulb properly.
Put a cotton glove on the hand that was holding the plier earlier. Pick up the replacement bulb with the hand that is wearing the cotton glove.
Insert the base of the replacement bulb into the socket inside the front of the flashlight. Turn the bulb a quarter turn clockwise with your fingers.
Insert the needle-nose pliers into the front of the flashlight. Grip the base of the replacement bulb with the pliers. Rotate the base a half turn clockwise to seat it in the socket. Remove the pliers.
Screw the reflector on the front of the flashlight. Reinsert the batteries in the same manner as they originally occupied and screw the battery cap on