Jack Puck: Square 2 Ton Press (Complete)Jack Pucks are revolutionary presses created to transform plant extracts into a compact paste and to remove excess water. Equipped with a 2 ton or 8 ton load capacity hydraulic jack, Jack Pucks are light & compact, easy to carry presses. User Instructions: Fix the press to a table with the two 'C' clamps supplied. Put the extracts in the mould Put on the cover and tighten it up with the wing nuts. Tighten the release valve with the handle (clockwise).