This is my robotic arm which is mostly made out of aluminium.

It has 6 joints with 9 motors, and three joints are able to turn 360°.

The base is very heavy and is made out of steel. It was a clutch by the way.

The 3rd moving part can rotate and needs some slip rings too.

The 4th moving part has an end effector.

The end effector has 3 "fingers" and is able to rotate.

The complete build with a remote control and a PC power supply.

These slip rings are for the touch sensors for the end effector.