In 1945 the CZ-36 was redesigned by Jan Kratochvil to make it easier (hence cheaper) to manufacture and became the Vzor 45 (model 1945) but is generally known as CZ-45. The safety lever which had sometimes appeared on the CZ-36 was eliminated (though a few early model 45s were manufactured with a safety lever). The changes included the addition of a side plate to simplify assembly and a magazine safety. The CZ-36 had a connector from the trigger to the hammer that ran on the left side of the magazine, whereas the CZ-45 has a Browning-style stirrup-shaped connector that runs on both sides of the magazine.