Review on Knape Vogt 8402 Slide Bracket by Gabriel Rosenberg

I am a business manager and have recently started renovating my own kitchen. I ordered 2 of these drawer brackets as samples. BUT. I later ordered a ProPack of KV 8450 rails and brackets from another online source and it appears that the actual KV brackets (see photo) are made of thicker steel, KV logo and part number, different slots and have holes and retain the rear end of the retractable box more securely. IMHO this is "fake". Buyer Warning.