6mm knurled Shaft 12Pin 1 Pole 11-Position Selectable Band Rotary Switch 6 Pcs

I (electrical engineer) tested the switches I received and was very pleased overall. These are solidly built, with a rotary knife tab that parts a pair of spring jaws to make the electrical contact. Note that these are break-before-make switches, so your different contacts will never be shorted to each other, not even for an instant as you turn the switch, but you will have a momentary open circuit when turning the switch. So consider that in your designs.Contacts are made of 22 gauge spring steel with a nickle electroplating for solderability. (I'm sure its actually metric, not 22 gauge, but close enough). The detent uses a steel wave spring and a double ball roller and is very powerful. This is not a switch that will get turned by accident. Hard enough to turn it on purpose. You can bend the steel wave spring to reduce the spring force and make the switch a little lighter and easier to turn if you want to.Like most electrical ratings on Amazon, the 0.3A contact rating is a complete fabrication. The seller probably made it up on the spot, and most likely doesn't even know what it means. But for once the truth is actually better than the lie. These contacts are super solid. I tested mine at 2 amps and the switch laughed it off "is that all you got bro??" Exact test results were 1.98amps for 30 seconds, no discernible temperature rise in the contacts, contact resistance was 0.068 ohms measured while under load.Basically these switches can handle at least 1 amp continuously, and much more than that briefly. The only catch is that being a break before make you will get a lot of arcing on switching if your load is inductive. Diode or MOV bypass is highly recommended if your circuit will allow it. The switch contacts are NOT arc resistant, so they will degrade very quickly if you ask them to switch large inductive loads. Switching something like a DC motor would probably ruin the switch in 50 operations or less unless you put external suppression circuitry in your design.The only thing I did not like about these switches is their size. They are not compact - over 2 inches in diameter. So if you are laying out a control panel with multiple switches its going to be a big clunky layout. I would have preferred one with a much smaller footprint. But I guess when you take into account the true current rating, its no wonder its big.

works fine, but given knob is too small to turn. should be larger size Knob,

These are going to need some room as expected and seem very heavily constructed. They are hard to turn but I bought a 10 Pack of Potentiometer Knobs: Black Chickenhead with Set Screw K7-2 which makes the turning much easier.

I got these switches to construct a resistance decade box to have around the lab just in case (it's better to have gear you never need than to need gear you don't have). It was a perfect package because a decade box typically has 6 dials, so this was one stop shopping.

I use these in my escape room submarine and they take a beating from enthusiastic participants. I would say under normal use they should last a long time. I would have rated them higher; however, i ran into consistent quality issues.

For the price of these I wasn't expecting much quality, but they ended up being nearly identical quality-wise to some of the name brand switches. Solid, with heavy locking detents. The turret holes solder well too. They're a bit oversized for one, but they're perfect for my Decade Resistance box project....

I wanted this for a project, but it takes a gorilla to turn the rotor. The contacts are very delicate so if you make a mistake while soldering there is a good chance that you will break it.

These are perfect for making a QRP (or low power) antenna tuning unit as the loading coil's inductive winding switch. Just add one variable capacitor for an L network tuner, or two for a T network tuner for tuning your antenna in line to match the radio. Most do not realize that they also work well just for shortwave listening only radios, so i have a few to build into a radio for antenna tuning and matching or to mount into a separate box for in line use as well. For ideas, look up; impedance matching.