Centre-Loc Disk Convertor.The Problem Solvers Center-Lock adaptor. No pinch bolt; mounts with included lockring.Not intended to be used with rotors over 165mm in diameterMade of AL-6061-T6 extruded, CNC-machined and broachedDesigned for use with Center-Lock hubs and 6-bolt disc brake rotorsLockring includedCompatible with QR and 12mm thru-axles only