an outer shell;

an inner shell housed in said outer shell;

a spindle housed in said inner shell, said spindle comprised of a spindle head, a spindle crown and a portion extending from said spindle crown for engaging a lock bolt, said spindle head comprising an uneven number of irregular sides, said spindle crown comprising an uneven number of pin enclosures comprising an axial depth, where a plurality of positions of said uneven number of irregular sides relative to said spindle crown defines a plurality of keyways;

an uneven number of radial locking pins comprising combination pins of a plurality of different axial lengths and bottom pins, said radial locking pins arranged radially from said spindle head in said pin enclosures where said inner shell substantially constrains said radial locking pins from moving in a direction radially to an axis of rotation of said spindle; and

an annular space between said inner shell, said spindle head and an inner surface of said spindle crown, said annular space having dimensions allowing access to said radial locking pins where each of said radial locking pins is required to be depressed within said pin enclosures a distance substantially equal to said axial depth minus said axial length of said respective radial locking pin for operating the radial pin tumbler lock.