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Screw

	Screw - Demonstration Model Product Number: SB42813M Checking pricing... Each Demonstration Model measures approximately 2-1/2 times the size of the student version and is great for classroom demonstration. An example of a simple machine, which converts a circular motio... More.

	Screw - Student Model Product Number: SB40566M Checking pricing... An example of a simple machine, which converts a circular motion (the turning of the screw) into a linear motion. It also lets you amplify the force a great deal, since turning the screw only moves... More.

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