Stainless Steel worm clamps, choose the size you need!
Either choose the 1/8" to 9/16" Adjustable Clamp [LEFT in photo] (works best with 1/4" or 3/16"Beer line AND 5/16" gas line!).
Or choose the 1/4" to 7/8" Adjustable Clamp [RIGHT in photo].
Easy to attach and remove.
Use standard screwdriver.