the roller needs a redesign keeps falling apart [SEP] i cannot use the roller more than a minute before the roller pops off the handle we have removed the plastic sleeves which helped and forced the wire bars closer together gently to not scratch them up yet the rollers continue to fall out this needs a redesign so the bars slide deeper into the roller to prevent it coming apart great concept bad execution the single gua sha tool is nice quality though it should be a tad bit thicker like all other quality gua sha tools i have used over the years so i will give this set stars overall would be nice to include a soft pouch as well thankfully i already had a cloth pouch to repurpose for this set