The ARRMA LIMITLESS ALL-ROAD SPEED BASH Harden Steel #45 Dogbone set from GPM MAF037S is supplied to reinforce drivetrain reliability under higher loads. The package contains both long and short dogbones produced in hardened steel #45 with a 6mm cross section to raise resistance to twist and fatigue. This upgrade is focused on dependable torque transfer and reduced service intervals for active hobbyists.