Most vehicles when changing the brakes you push the caliper in to fit back over on 2000 Volkswagen Beetle

the new pads, but on Beetle you turn clockwise w/special tool. Are there threads inside of these "clockwise calipers"?, and if so, how do they work with pressure?, because that's usually how calipers work.

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1 answer
Many cars have calipers that the pistons reequire a tool to rotate the piston back to its starting position. This I have seen only on the rear brake calipers. This enables adjustement for the park brake as the brake pads wear.