Fishing for Trout, Bass, Salmon, pike  and Lake Trout . these are very effective. Use in any depth of water. Some fishermen fill the cavity using syringe with bait scent. 
Available with  # 4 nickel French blades.
Proven to catch! and catches Lake Trout!
Bullet shell can fill with water to allow slower and deeper action. Brass reflects UV light. 
2/0 Lazer Sharp hook 
Retail $6.99