MechanicTron's Arm

Made more to look good than to function, although at a glance, several parts appear to be able to flex and rotate.

The arm was designed with several holes in the upper and lower arm to (presumably) hold tools. The holes were dimensioned for if this was a human-size robot, so about 1:6. (Sorry to anyone who wanted to put real screwdriver bits in the lower arm.) If this were a real robot, many parts would be able to rotate freely, and all joints would be able to flex with the visible overlappin