The HL 7-3 Start Gate features one isolated timing contact. While closed, the start gate is prevented from accidental opening caused by minor knocks and bumps trough the use of the blocking feature.

An internal spring brings the start gate wand back into the start position after each opening. Backing action built into the wand mechanism camshaft is very effective at eliminating unwanted rebound action after opening.
 
The wand (HL 7-114) is very rigid and thus highly accurate but durable product. It is installed by inserting it through the rear of the shaft holder and is held in place by a spring-mounted bearing ball.