This is just what you have come to expect from Mec-Gar -- the highest quality after-market magazines available. These function superbly in the CZ vz 97B and it is easy to understand why EAA has made these the factory OEM for their Tanfoglio clone of the 45acp CZ 97B, as these are top-notch magazines!
The sturdy steel construction and anti-friction coating make these actually outperform the quality CZ factory magazines that ship with the pistol. Pick up a couple of these from Greg Cote and see for yourself. You will get a top-quality magazine at a great price!