Ulincos Momentary Push Button Switch U19A1 1NO SPST Black Metal Shell Suitable for 19mm 3/4" Mounting Hole Momentary switch: Push & Hold,ON; Release,OFF Metal shell,100% brand new and high quality,mechanical life for 500,000 cycles Easy to install, it has non-solder connections,screw-type terminals to make fitting very easy These terminal holes size are 2.1mm (5/64") diameter, you can use AWG 12 wire maximum; popular size of AWG 14 to 18 are fine also Universal fit all 12V Car SUV truck conversion Van RV Boat Yatch.Great for electromagnetic starter, relay, Horn Button Switch, PC Power Switch or any circuit controls