Imperial 81644 Momentary Door Switch

one of my projects building an observatory meant that i needed to have a roll-off roof this was going to entail having a motor to turn rotate with gears that will roll the roof on and off this would save me pushing it on enough but i did need some relay arm switches the relay arm switch or arm hinge switches are available both on amazon and ebay in my case i needed four and they were doing a deal on amazon so i bought them from there i will leave a link in the description below for the amazon link these particular switches are made for strong endurance the shell is made from plastic and alloy there is a rotatable lever arm actuator when the switch is activated it will automatically reset when it comes back to the center position you do have two internal options the switch can be either normally open or normally closed i did need a switch that would be waterproof although there being a l