A 5 cm. aluminium pulley has a universal frame and can be clamped in any position to a wall, bench, drawing board, corner / edge of a table, or fitted to a retort stand rod of diameter 12.5 mm. Its two clamping screws have bakelite knobs for easy working.
Comprising a 50 mm. diameter pulley carried on an aluminium boss, 20x20x110 mm. long provided with a hole and clamping screw to accommodate rods up to 13 mm. diameter. Tapped holes are provided so that the pulley may be fitted on to the boss with its axis of rotation in any one of the three planes.