Product review (5 stars): Worked Like A Charm
This is sort of a hard switch to find. I like to refer it to a refrigerator door switch for the light. When the door is opened it closes the circuit. My application was similar. On my boat there is an electrical engine hatch actuator. This switch prevents the hatch from opening when the transom door is closed. Without this safety switch, raising the rear deck would tear off the door if the door was not open. The original switch was 23 years old and became intermittent. Even when it worked it was having issues supplying sufficient voltage to the actuator. Replacing the switch with this one returned the operation back to when the boat was new. This one was slightly larger in diameter. Using a dremel with a sanding disk I enlarged the hole in a minute or two. It now has a tighter fit than the original.

While the cost to make these is probably less than 10 cents, I did not feel ripped off paying $4 for two of them. In fact I think I got the better of the deal since the price included shipping. The seller is spot on by not selling just one. I now have a spare one; hopefully I'll be able to find it 20 years from now. Shipping was quick. While I can't say for sure, I think I got them in less than 2 weeks.