Spare Blanks for lever kit

For investigation into the concept of moments, principle of lever and balances by a group of upto 8 students using the items included in the kit. Comprises five wooden beams of size about 600x44x3mm marked every 38mm and a groove on the opposite surface across its center that acts as a fulcrum point. The wooden beam is accurately balanced when its fulcrum point is located on any of the 4 fulcrums included. Supplied complete with 50 metal blanks of about 25mm square, 40 of aluminium and 10 of brass.