Brake block lockey It is manufactured according to the 1203-75 State Standard and recognized invention for its manufacturing. It is installed on the main-line locomotives, passenger and freight cars of the 1520-mm-wide railway lines, equipped with the composite or cast-iron shoes and blocks (rotary or unrotary). Certificate of Conformance # UA1.110.86487-07 of 04.07.2007 Certified by Production Certificate # UA3.110.0304-07 of 03.07.2007