Allen Bradley 800T-NX191B Cylinder Lock Push Button 30 mm Ser A 1 NO 1 NC Keyed

New Surplus, Acquired From Spare Parts Storeroom.
This is a push button with a key release. You push and it stays there until it is released with a key. Ideal for machine lockout in case of a shutdown.
Comes with 2 keys.
1 NO 1 NC contacts.