Jig bombs are the solution to add the most weight to your files. They will invert any hook with their unique design and are about 20% heavier than their slotted tungsten counterparts. Available sizes – 2.5mm-5mm. Bead sizes 3.5 mm and smaller come in 20 Packs. Size 4.0 mm comes in 15 Packs. Size 5.0 mm comes in 10 Packs.