10pcs Single Knife Switch:Used for Physics Laboratory,School Electronic Experimenting,Great for Demos Teaching Basic Principles of Electricity & How a Simple Circuit Works

I needed ONE to test some rechargeable D cells. It worked perfectly, so I had to buy 6, I used 1 once & likely won't need it again.

These worked for our circuit unit. The only thing is that the orange pieces screw all the way off and students were taking them and throwing them/ dropping them. Other than that, they worked and help up to rough handling.

good value

I was pleasantly surprised how much I like these knife switches. I am used to a much smaller design that has more metal. But the larger size of this switch made it really easy for the children to connect their wires and there is no confusion whatsoever about how to connect the wire. Great job!

Have a 41 year old wall clock. Beautiful clock. Used these to replace the original battery holder.

The black and red knobs on many of my order simply spin and never tighten on the wire my students were trying to use. They ended up just sticking it on the underside as they could not get the knobs to work and hold the wire.

Bought these to be used for some homeschool projects learning about electricity. They were perfect for the kids to use and they have continued making circuits and using these. Also was a great chance to talk about another Edison invention while using these at the same time.

So far the switches have held up well with multiple uses by my elementary STEM students (grades 3-5)!