Comprises
two metal trays, 130 x 55 x 23mm joined together by a pair of spring steel
strips 10mm wide. The distance between the tray being 215mm. One tray is
drilled to holes three equal cylindrical masses. The other tray acts as an
anchorage and may be clamped to the bench either horizontally or
vertically. Complete with three masses and G clamp for mounting.
dimensions: - 325 x 130 x 23mm overall.