The Shock Blade Heavy Cover Tungsten Knocker is a new addition to our popular Shock Blade line. Built around a solid one piece, 97% tungsten football head that creates added sensitivity and generates extreme vibration and hunting action. Great for working areas that you would typically throw a crank bait or football jig such as off shore humps and ledges, deep creek channels, rip rap, rocky points, submerged wood, hard clay bottom and gravel banks to name just a few.