Tungsten's weight advantage over lead lets a smaller Montana Fly bead do the same sinking job on standard hooks, without paying up for premium countersunk options. Specifications Pack Quantity: 20 beads per pack Design: Countersunk hole, for sliding around the hook bend Value: Priced as a cost-effective option Best for: nymph patterns that need to sink quickly and sit balanced in the water; use these countersunk beads on regular hooks (pair slotted beads with jig hooks instead). For jig-hook patterns, see Slotted Tungsten Beads instead. The countersunk hole simplifies rigging at the vise and helps the bead sit balanced on the shank. Tungsten also holds up to the friction and abrasion nymphs take fished along rocky or gravelly riverbeds, so flies tied with these beads stay serviceable across repeated outings. FAQ Q: Do these beads work on jig hooks? These are countersunk and sized for regular hooks; for jig hooks, reach for a slotted tungsten bead instead, which seats onto the shank correctly.