A Jubilee or Hose Clip is a circular band which can be tightened with a worm gears
fixed to one end of the band. Tightening the screw reduces the diameter of the circle formed by the band. They are primarily designed to hold hoses onto pipes.
Originally made from stainless steel but are now available in brass, mild steel and Nylon.
Jubilee Clip is a brand name from a British Company, L Robinson & Co but has become synonymous with this method of fixing.