I'm very happy with this product - it's well built and locks my desk securely so I can turn the vise pretty hard without shifting! For those reviewers who have complained about a lack of customization, I think I have an idea what's wrong. You can lengthen the "foot" portion of the tool to adjust the height, but it's very important to maintain the preload by holding a separate nut against the spring near the factory setting. When I first unpacked this device, the threaded ring was snug against the leg and wasn't very visible. I also thought it was defective. However, upon closer inspection, it turned out that the yoke can be screwed towards the spring, which allows you to maintain the preload and effectively adjust the height throughout the specified range. Hope that helps.
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