what is the texture of copper?
Your vechile actually has an opcitial ABS option an since you do not know this means you actually have no ABS at all. Stupid Saturn for putting drume brake in the back for god sakes its a truck it needs ABS with disc brakes. But if i were you i would have had bought that car i would of bought a nice european car.
easiest way to check is to actually look at the abs unit under the hood, each brake will have its own channel coming from the unit, but at the same time, I am thinking that drum brakes are incompatible with abs since it must apply and release the brake several times a second, and drum brakes are just not made to do that.
copper, like all metals, has the property called luster. That means it can be made to be smooth and shiny. However, because it can be formed into many shapes by melting and casting etc. it could have any feel a person would want. So it really depends on the form of the copper. Usually it is sheets or pipes or wire - all smooth.
