These little bits of wire hold the basket inside the portafilter. In a sense, we owe our ability to even make espresso to these 0.80p bits of metal: think of them like the ‘O’ ring on a space shuttle solid rocket booster. Small, inexpensive… but if one breaks at the wrong time, well Houston, we have a *major* problem! Always add a few of these bad boys to your order, just in case!
Easy replacement to solve problem of filter basket not being held firmly in portafilter