The LH0870 Vossloh Schwabe 100572 is an nonshunted, rotary locking socket / tombstone / lampholder. It is for G13 medium base LED or fluorescent tubular lamps. When the lamp is inserted it is rotated 45 degrees and locks into place. The LH0870 100572 has flexible wings for easy insertion into the light fixture.
Link to T8,T10,T12,lamps that fit this socket