Dave's Hobby Shop by W5SWL ... We sell the good stuff ! Heavy Duty UHF Male to UHF Female Quick Disconnect Premium Adapter Series Product Details Brand by W5SWL Model 721405427734 Side A UHF Male Side B UHF Female Fits Cable Type NA Dielectric Delrin RF Pin Plating Nickle Body Plating Nickle Impedance Ohms 50 Other Detail Heavy Duty Version Package Quantity 1 Does not include coax and PL-259 shown in image for illustration. This the Heavy Duty version of our standard UHF Male Quick Adapter. It has heavier fingers to grasp the UHF Female and wider notches for the PL-259 or UHF Male points that fit onto the adapter's female side. Nice solid construction! These are perfect for experimenters and those that use these a lot such as on a work bench. If you are just using a UHF Male Quick Adapter to unhook your rig, then our standard version should work just fine. But if you are constantly using these for test connections, etc then you will want this Heavy Duty version. Did you know ... Many people ask about how much power will these handle and how is the VSWR of a quick adapter. The fact is, a quick adapter will actually perform quite well often operating with low VSWR and quite well at legal limit power. But it depends on a couple of things. First, it depends on your VSWR on your feedline just like anything else in that section of your station. Let your VSWR go high, and the performance of the quick adapter will suffer. Second and most of all, the factor affecting performance and power is the type of UHF female you have on your radio or device. The quick adapter must make contact on the shield side of the feedline with the edges of your female connector. That is really a pretty small area if you think about it. Some UHF female connectors or SO-239 connectors are quite honestly not up to specs and will be a bit smaller in diameter or the threads won't be quite able to make good contact, etc. Our quick adapter is designed to fit a certain standard, one of which most quality UHF females will easily meet. So the honest answer on how much power and VSWR is "it really depends on your female" connector on your radio or device and how well the quick adapter mates to the female. Quality Products for the More Knowledgeable and Experienced User ! From W5SWL