Knife switches are most closely associated with horror films set in the 1800s, especially in underground laboratories such as the one depicted in Mary Shelley’s novel Frankenstein. This double knife-double throw switch allows for up to two circuits to be live or to be turned off. Simply connect the ends of the circuit to the two metal screw contacts on the switch and instantly you have mechanical way of breaking and connecting a circuit.
This glass Erlenmeyer mug makes an excellent gift!
A massive mounted set of 100 rocks and minerals found in the US,
Use this temperature-controlled soldering station for a variety of soldering applications!
Learn all about the science of light, optics and visual perception with this wonderful kit!
Ever wonder how to survive in the wilderness? These cards can help!
This microscope is so versatile you can even take it with you on a job site!