An improved filament clip for 3 mm filament which works by pressing the filament against the side of the spool. This version holds the filament more tightly and fits tightly to the spool wall.Catch the filament with the short leg with the concave surface and fit it against the inner wall of the spool and clip the other longer leg over the edge of the spool.(This is an improvement of my thing 39622, which I found did not grip the spool wall tightly enough.)