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Would you buy this item again? Yes
This item was purchased as replacements for several proxes of a different brand. This was done mainly for the QD feature, rather than failure of the old proxes. 2 things I would like to mention. 1. The threaded length is approximately 4mm shorter which forced me to have to move the mounting bracket of one of the switches. This would probably not be an issue on a new installation. 2. The machine I was using these on had a simple bridge rectifier for DC power. These switches WILL NOT work in this case. They would trigger several times per second whether in front of a target or not. Adding a 1000 mfd 50V electrolytic capacitor across the bridge resolved this issue. With this in mind, I would not hesitate to purchase them in the future.