This wooden machine has a sturdy wooden construction ideal for classroom use
The large block mounted around the head of the screw gives students additional leverage so they can easily break eggs or squish other objects with the screw that would be difficult to break with their bare hands
The square top also makes it easy to measure the distance top of the screw is turned vs. the distance the screw is sent into the board
Includes an instruction manual to fascilitate students and teacher use of the apparatus
Made of particle board and wood with metal screw mounted on two boards. Top of screw is 1 7/8" square. The base is 7 1/2" by 4" and sits 4" high.
Simple Machines, Screw
Screw - Wooden Simple Machine with base and elevated board to hold screw