What is the diameter of the retaining screw ring or of the threaded collar (what size hole opening does it fit)? For a vintage vanity light. Thanks.

1/2 inch. a better switch for a vanity light would be smaller and require a 1/4 inch hole. A mini bat toggle switch SPDT. Two or three amp rating should be enough.

im trying to fine a on and on switch that go back to off when you release it

Actually, the listing does NOT clearly state whether or not it is momentary contact. You have to go to the Gardner Bender site to figure out what these are. The Amazon listing title has parentheses around the word (OFF). It should not. Go to the Gardner Bender website and search GSW-16 and you will not see any parentheses anywhere in the circuit specification. You have to be very careful buying DPDT switches based on the Amazon listings. You are better off finding what you think is right and going to the manufacturer's website to see if the model number is the right one for your application. You could be looking for a GSW-123 or something similar.

Can this be use as a kill switch on a car?

Yes, it can be used as a kill switch, but it depends on what circuit you're interrupting. Keep in mind how much current will go through the switch (rating is 20 A, 125 V AC).

Wire diagram for on-off-on gsw in line. if i let go power is off? thanks

This switch is a Double Pole, Double Throw switch, which means all contacts are broken when the toggle is in the center position. When the toggle is pushed in either direction the contacts on that side of the switch make contact. For sake of discussion, assume we are speaking of the one set of contacts along the long side of the switch. When the switch is pressed forward the center and far (still along the long side) contacts will make contact. When the switch is pulled back, the center and near side make contact. It is also a Momentary On which means the contacts will only make contact while the toggle is pressed. Once released the toggle automatically returns to center which is usually the off position. I hope this helps. If you are still puzzled, ask the same question and specify you want a wiring diagram.

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⚙️ Switch to heavy-duty reliability — because your gear deserves the best!

BUILT TO ENDURE - Metal construction and 75°C max temperature rating ensure long-lasting durability
CERTIFIED RELIABILITY - CSA-approved for safety and peace of mind in demanding environments
EFFORTLESS INSTALLATION - Standard 15/32 - 32 inch nut size with screw terminals for quick setup
VERSATILE COMPATIBILITY - Perfect for emergency lighting, industrial equipment, and replacement needs
POWER THROUGH WITH CONFIDENCE - Handles up to 20 amps for robust industrial performance

The Gardner Bender GSW-11 is a heavy-duty SPST toggle switch designed for industrial and emergency lighting applications. Rated for 20 amps and 125-250V AC, it features a durable metal body, brass contacts, and screw terminals for secure connections. With a 75°C temperature rating and CSA certification, it ensures reliable performance in demanding environments.

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Mounting Type	Panel Mount
Brand	Gardner Bender
Material	Metal
Terminal	Screw
Voltage	250 Volts
Current Rating	20 Amps
AC Adapter Current	20 Amps
Contact Material	Brass
Insulation Resistance	100 Degrees
Operating Voltage	125 Volts (AC)
Operation Mode	ON-OFF
Specification Met	CSA
Manufacturer	GB Electrical
UPC	032076890117
Model number	GSW-11
Colour	multicolour
Number of Memory Sticks	1
Item Weight	31.8 g
Product Dimensions	5.08 x 2.87 x 1.27 cm; 31.75 g
Item model number	GSW-11
Item Height	0.5 Inches
Item Width	1.13 Inches
Included Components	1 pk
Are batteries included?	No

Gardner Bender GSW-11 Heavy-Duty Toggle Switch, SPST, ON-OFF, ¾ HP 125-250 V AC, for Replacement Industrial Equipment / Emergency Lighting & More

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