Overview of Motion Pro Deluxe Piston Pin Puller Interchangeable pin adapters made of durable 6061 aluminum Fits all piston pins from 12 mm (1/2″) to 24 mm (1″) and will work on both full skirt and short skirt (slipper) pistons Non-marring aluminum pin adapters Features a durable blue anodized finish with laser-engraved logo Patent pending.