Two are the same size and one is larger. I believe they are metric but i dont think i have the right size.

Also, i am pulling the engine from the bottom and i am going to lift the car from the holes in the frame (under the coolant overflow on the pass side, and under the air filter on the drivers side). Are those the air bad sensors that are attached to the frame underneath? The best way i can describe them is that they are cylindrical with a flat on one side(the side that attaches to the frame from underneath). Can i just remove them to get the chain wrapped around the frame so i can lift the car up, or what do i do here? Any help is welcome.

Brandon