This nifty little device weighs three pounds but lifts a whopping 500 due to precision machining. Even more remarkably, it uses only two 1-1/2 V D cell battery (not included). Our cold rolled steel core and yoke are ground to within a fraction of 1/1000". The coil has 4 strands parallel. Includes: alligator clip leads, battery holder fastened directly to the magnet, and instructions with experiments.
