Make a bubble-tight connection to any Swagelok, Parker, Hoke, SSP, Tylok or equivalent tube fitting without a wrench

• An excellent solution for connecting to tube fittings for pressure calibration, gas sampling, pressure reading and testing
• A unique design that seals on an o-ring to prevent damage to a tube fitting
• Make and remake hundreds of times without over-tightening a tube fitting
• Made in USA