If you're into RC rock crawling and want to upgrade your HSP 94180 or similar 1/10 scale models, these RCAWD steering arm caster mounts are exactly what you need. Made from machined aluminum alloy, these things are built tough to handle rough terrain without adding unnecessary weight. The team at RCAWD has been doing this for over 15 years, so they really know what RC enthusiasts want - precision parts that actually improve performance without breaking the bank. Installation is straightforward and they make a noticeable difference in how your rig handles. You'll get better steering response and more durability compared to stock parts. These specifically fit HSP 94180, 180003, and 18006 models, and come as a set of two pieces (left and right). What I appreciate about RCAWD is they develop everything in-house with input from actual RC fans, so the parts are tested in real conditions. The aluminum construction means they won't rust or corrode like some cheaper materials might. Plus, the tracking is available for all orders so you know exactly when your upgrade parts will arrive. Whether you're building a new crawler or upgrading an existing one, these caster mounts will help your RC vehicle tackle those tricky obstacles with more control and stability. Definitely a solid hop-up option if you're serious about your rock crawling game.