This is my first time using this cartridge as part of a JACO Digital Air Blower.The air blower is a great tool but this cartridge is superb.It slides over the valve stem so easily you might think it wasn't fully engaged , but you would be wrong.Removal is just as easy and with very little air loss at the exhaust.When I bought the compressor their standalone cartridge was either on order or not available so I was glad to see I wasn't ordering them separately I use it to fill a portable air tank, just plug it in and let the air compressor fill n without holding down the triggers or maintaining pressure on the cartridge.