A professional who installs catches in vacuum cleaner hose couplings, using fingers and metal pry. Responsibilities include:

• Positions spring-steel ring in holding groove on inside wall of coupling.
• Pries ring away from coupling wall, using handtool, and slips latch bar between ring and wall.
• Positions latch bar so that push button attached to bar protrudes through opening in coupling wall.
• Inserts second latch bar at opposite point on coupling.