Stand or Sit(Stationary position), Walk(Move, Traverse), Use hand/fingers to handle or feel (Operate, Activate, Use, Prepare, Inspect, Place, Detect, Position), Climb (stairs/ladders) or balance (Ascend/Descend, Work atop, Traverse), Talk/hear(Communicate, Detect, Converse with, Discern, Convey, Express oneself, Exchange information), See (Detect, Determine, Perceive, Identify, Recognize, Judge, Observe, Inspect, Estimate, Assess), Reaching, Repetitive Motion. Service Steel Aerospace (SSA) is a leading global distributor of high-performance aerospace metals, including stainless steel, titanium, and specialty alloys.