Tungsten Mop Flies from ReelFlies. Get down and dirty fast with or Euro Nymph tungsten Mop flies from ReelFlies. Might ruffle a few feathers in the purist brigade, but love then or hate them they work! They make a great Grub or Larva imitation with the dread lock fibres pulsing to provide an juicy fat irresistible offering to hungry fish. Fly and float fishermen have found them to be a great alternative to the traditional Glo bug or Egg fly pattern. Try them out on some fall or spring run trout, you might get a surprise just how productive they are. All our Mop flies are tied on a wide gape competition grade Euro Nymph style hook and top quality tungsten bead head! These flies just slam fall and spring run Steelhead and can be run under a large strike indicator or under the float with a centre pin rig.