Ever wonder why professional callers use what looks like a whiffle ball bat as a grunt tube?Simple, they like the sound it projects with its harder plastic shell. Knowing these can be cumbersome to pack in the woods we enlist 2008 World Championship Pro Division caller Joel Turner to help develop the Rock Hard Grunt Tube. At just over a foot long, half the size of he leading competitor, this grunt tube delivers what the Pro's demand while being compact enough to carry into the woods.