Search Products Shop by Category  Astronomy, Space  Batteries, Power Supplies  Biology  Books  Chemistry  Clocks, Watches  Crystal Growing  da Vinci Gear  Dinosaurs  Einstein Stuff  Electronics  Fun, Toys & Gifts  Games & Puzzles  Geology & Fossils  Glow-in-the-Dark  Laser Pointers  Light & Optics  Magnets  Microscopes  Physics  Posters, Postcards  Robots  Science Kits  Software & Videos  Solar Stuff  Study Charts  Telescopes  Videos (DVD)  Weather Instruments Shop by Price:  under $5  $5 to $10  $10 to $20  $20 to $50  $50 and up Shop by Age:  5 years old  6 - 7 years old  8 - 9 years old  10 - 11 years old  12 and older Store Info:  Catalog Request  Help / FAQ  Contact Us  Terms Of Use Order Tracking: Order No.: Password:		Cart items: 0 Total: $0.00     Mini Knife Switch - Single »  Science eStore Home  »  Science Kits  »  Mini Knife Switch - Single click here for larger image Price: $2.99 Sale Price: $1.95 each Item No: 11109 Sold Out: Check back in 2-4 weeks to order this item. 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. Your child can feel like Dr. Frankenstein with the Mini Knife Switch. A knife switch is a must have for anyone doing a science experiment involving electronics or electrical currents. This miniature knife-switch allows for a circuit 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! The mini knife switch contains an easy to operate lever and two pre-drilled holes for mounting! This is a great demonstration tool for teach someone the basics of how electricity works and how it is controlled! Box Size: 2.00in (5.08cm) x 1.00in (2.54cm) x 1.00in (2.54cm) Recommended for ages 13 and older. Weight: 0 lb 2 oz ( 0.06 kg ) Related Products   Contact Key Switch The Contact Key can open and close a circuit and is very handy in demonstrating Morse code. Item No: PL1111 $4.99 $4.49 /each  View/Buy   XP Connection Wire with Alligator Clips The Connection Wire w/ Alligator Clips have many practical uses and this great color coded assortment will definitely come in handy for many of your science needs. Item No: PL828 $3.99 $2.29 /each  View/Buy
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