The adapter is compatible with all Park Tool centering fork models and allows easy, precise clamping of 12, 15 and 20 mm diameter thru axle hubs.
.
It can also be used to clamp a front wheel with a Cannondale Lefty hub (you'll need to remove the hub cap and be careful - the hub isn't exactly centered in the centering fork, you'll need to use a PT-WAG-4 scale to check the position, etc.).