Designed specially for students. Made entirely of heavy gauge steel, the base and plane are connected by a hinge, allowing the plane to be clamped at any angle from 0 to 45. Vertical displacement, angular displacement and distance from the hinge can be measured with built in scales. The pulley can be adjusted to ensure that the cord runs parallel to the plane. Board dimensions 600 x 100 mm. Pan and roller included. Complete with instructions.