These centerlock adapters from KCNC are designed to allow the use of standard ISO 6-bolt rotors with DT Swiss and Shimano centerlock hubs. Since Shimano is the only manufacturer of centerlock rotors, adapters such as these make possible the use of more widely available rotors, as well as exotic and lightweight options.
This centerlock adapter is available in two versions: a standard version for quick release and 12mm thru axle hubs, and an oversize version for 15 and 20mm front hub thru axles.
First, sandwich the rotor between the adapter's splined inner plate and the outer pegged plate, then attach the assembly to the hub. Once fitted to the hub's centerlock mount, the lockring is threaded on and tightened down; the standard version uses a Shimano cassette lockring tool, while the oversize version uses an ISIS/Octalink style bottom bracket tool. If a torque wrench is available, tighten the lockring to 40 Nm.