The Sentrol Roller Plunger contacts save installation time while providing reliable magnetic contact security. The contact switch is activated when the door opens, releasing the tension on the wheel plunger. Drill only one hole to mount the roller plungers; the entire magnetic contact is housed in a economical single unit. Recessed mounting hides the contact within the frame of the door it protects.

Features:

• Benefits of both a plunger and ball contact
• Works on all doors, including steel doors
• Reduces installation time - drill only one hole