RC crawler fans, if you're tweaking your TRX4-M 1/18 scale rig, this brass wheel hex adapter is a solid upgrade. Made from high-quality brass, it's sturdy, impact-resistant, and adds a bit of weight down low, which can help with stability and traction on tricky terrain. The drive size is 4mm, designed to fit your TRX4-M perfectly without any fuss. Installation is straightforward – no complicated steps, just swap out your old hexes and bolt these on. The brass construction is more durable than plastic or aluminum, so it stands up to rough use and wear over time. It's a small part, but it can enhance the overall look and performance of your crawler, giving it a more premium, detailed feel. Great for hobbyists who enjoy customizing their RC cars for better handling or just for the cool factor. Whether you're crawling over rocks, mud, or indoor courses, this upgrade adds reliability and a touch of personalization. Compatible with TRX4-M 1/18 scale models specifically – double-check your model to ensure fit. A fun, affordable way to pimp your ride and maybe even impress your RC buddies. Get wrenching and enjoy the enhanced durability!