These are an upgrade for the Axial AX-10/SCX-10 axle housings that benefits the rig in several ways. They add weight down low to help keep the center of gravity low on your rig, enabling you to run less rotating weight in the tires. They also "BEEF" up the axle housing itself to help keep from snapping the housing in half. The main benefit is that they give you a solid metal mount for the c-hub screws, instead of the stock thin plastic that normally holds the c-hub screws and strips out easily.
The benefits of brass are that it will not rust like the original SCX10 Beef Tubes and brass is just a bit heavier that steel at 1.7 ounces per set.
They will work in both the front and rear axles.
You will receive two Standard Beef Tubes (one axle).