Hey RC enthusiasts! If you're running an Axial SMT10 monster truck like the Grave Digger (AX90055) or MAX-D (AX90057) and want to step up your game, these hard steel gear sets are exactly what you need. Let's be real - those stock plastic gears can only take so much punishment before they start wearing down or straight up breaking, especially if you're doing some serious bashing or racing. These upgrade parts are made from durable hard steel that can handle the torque and abuse way better than the original components. The set includes 2 pieces for your differential assembly, finished in sleek black that looks awesome through those monster truck wheels. Installation is pretty straightforward if you're comfortable working on your RC rig - just swap out the old gears for these beefier ones and you'll immediately notice the difference in performance and durability. No more worrying about stripped gears when you're sending those big jumps or powering through rough terrain. These are genuine upgrade parts designed specifically for Axial SMT10 models, so you know they'll fit perfectly and work with your existing setup. Whether you're competing or just having fun with friends, upgrading to steel gears gives you that peace of mind that your truck can handle whatever you throw at it. Your Grave Digger or MAX-D will thank you with better performance and longer life between repairs!