F-Machine Quick Connect attachment-set - For all F-Machine sex machines with an M8 thrusting rod thread. This is a quick-connect toy adapter with an M8 male thread. It was designed for quick toy changes or for easy assembly and disassembly of your machine and attachments. This adapter is designed for direct mounting on the 10 mm M8 push rod that comes with the F-Machine Alpha, Pro (3 and 4), and Gigolo. The connector screws directly into your Vac-u-Lock, Double Trouble, USB, etc. Once installed, you can change toys extremely quickly and easily with a click, even with wet hands!