These rods are 13 inches long and are the same rods used at Gordy's Gunshop and in the Grizzly Gunsmithing Video. *Grizzly rods are not caliber specific, they come in 17 Caliber, 20 Caliber, #1, #2, and #3. *The grizzly rods take our standard bushings as used on our reamers. *The #1 rod takes 22 cal to 6mm. *The #2 rod takes 25 cal to 7mm. *The #3 rod takes 30 cal and up.