Two lengths of extrusion with jointing piece to give a maximum working length of 100 inches (2540mm).the clamps can slide along each of the extrusions with adjustable friction washer on the clamps to prevent them sliding to freely. One of the extrusions has a dual metric/imperial scale. specification:. Maximum material clamping thickness 32mm. spare parts::. Trend varijig system clamp kit (pair) tr_vjs/ck. Trend varijig system guide connect block tr_vjs/g/cb. related products::. Trend varijig system adjustable frame 700 tr_varijig.