Breakthrough Clean Technologies premium carbon fiber rods offer the safest way to clean the inside of your barrel. Featuring an ergonomic handle and two premium ball bearing sets, the rod can smoothly migrate through the bore of your barrel without binding up under pressure. Its carbon fiber rod offers you the security of knowing youll never have to worry about scratching or damaging the rifling inside the barrel of your firearm. Its lightweight yet durable carbon fiber construction is long lasting and wont permanently bend or break under pressure.Features : "36" - .17 Cal - .22 Cal / Fits all standard 5-40" threading, Premium carbon fiber cleaning rods Ergonomic handle and two premium ball bearing sets Lightweight yet durable