Upgrade your force table and inclined plane experiments. The Super Pulley, with its integral clamp, makes set-up and alignment easy. The pulley height is fully adjustable, so you can skim the top of a force table for parallax-free readings, yet keep the force parallel to the track on an inclined plane as shown in the photo. Fits tables from 0 to 2.0 cm (13/16 in.) thick.