
Single switches have short thin leads that don't stay on the breadboard. All other sizes have longer, stiffer wires and work well. I've attached a photo of a single switch next to a double switch. The little box they come in is disorganized. It comes with 9 compartments, but some compartments do not fit all circuit breakers of the same size, so the breakers are either placed in other compartments or in the 9th compartment, which contains one of three different sizes.

TWTADE/AC 24V 10A Coil Electromagnetic Power Relay 8 Pins 2DPT 2NO+2NC With Indicator Light And Socket Base -YJ2N-LY
9 Review

5Pcs 19Mm 12V 24V Waterproof Latching Push Button Switch With Wiring Harness And LED Indicator Light, Pre-Wired SPDT Self-Locking 4 Pin Marine Metal Switch For Boats Cars Trucks (Blue)
22 Review

Adjustable Regulator Generator PEMENOL Controller
9 Review

Vacuum cleaner KARCHER VC 3, yellow
176 Review

Acoustic system BEHRINGER Eurolive B115D black
11 Review

π Enhance Your Electrical Work with Klein Tools 69411 Accessory Adapters
7 Review

π Bussmann GMA 5A Acting Cartridge Listed: Reliable and Efficient Cartridge Fuse for Your Automotive Needs
7 Review

Square HOMT2020 Circuit Breaker Homeline
7 Review