It carries several members; all end in something hard. It hangs around in all the joints and sometimes in the yard. A tool you use in many ways, you raise it for attention

The answer to this riddle would be an arm.

Explanation:

The arm carries several members; the fingers, which all end in something hard; the nails. It hangs around in all the joints, meaning everywhere you go and sometimes in the yard since you sometimes go to the yard. It is a tool which one can use in many ways and one raises it in order to get attention from others.

there is no poster. if you add a poster then we can answer.