Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to use a can opener [title] Understand the components of a can opener. [step] Though it may look like a simple tool, it's actually comprised of three different machine apparatuses. The two long arms that clamp onto the side of the can are the levers.

Ending1: There is a single crank or lever that springs out of the can opener to turn something that's already on the of the can opener. [substeps] The crank or lever does not make a certain amount of noise. Ending2: The controls have multiple components, and each controls how much pressure you use to control the pressure of the can. [title] Insert the screw into the small hole in the can. Ending3: The handle that is used to turn the can is comprised of an axle and a wheel. Lastly, the circular wheel that cuts into a can is called a wedge. Ending4: These blades extend down from the bottom portion of the can's lid to the dispenser or cover. [substeps] You may also see that the tube-tip picknose pliers containing the latch and pump are used as opposed to the basic clamps for counter-clockwise fermentation.

Answer format: ending1/ending2/ending3/ending4