Strong locking when switching. The hole size is small because the outer frame doesn't protrude too much. Probably easy with a 3/4" drill bit, but very tricky if you're making the hole with another tool. The switch will melt if you try to solder wires unless you are very good at controlling the heat while soldering. LEDs are too bright for use in a car if you cannot remove the LED from the driver's eyes at night. This is my greatest weakness. Look at the picture where I installed the switch with the LED pointing down as far as possible.
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