I believe those a PEX clamps, and are put on and removed with a special clamping tool. Usual solution is to cut off and throw away, sometimes have to replace entire hose if it gets too short, then replace and reclamp. I do not have a tool for these, Have not had to repair one yet. Most RV repair places have them, or Lowes/HomeDepot sell the tools and clamps in plumbing supplies. But beware, there does not appear to be any standards for size or width of the bands, so finding one exactly like those may be a problem.